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2087615380 = 2251933791427
BaseRepresentation
bin111110001101110…
…0111101110010100
312101111012211221011
41330123213232110
513233412143010
6543052502004
7102506303134
oct17433475624
95344184834
102087615380
1198144a374
124a317a904
13273672a96
1415b384ac4
15c341ca8a
hex7c6e7b94

2087615380 has 48 divisors (see below), whose sum is σ = 4421430720. Its totient is φ = 827947008.

The previous prime is 2087615347. The next prime is 2087615381. The reversal of 2087615380 is 835167802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2087615381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1462227 + ... + 1463653.

It is an arithmetic number, because the mean of its divisors is an integer number (92113140).

Almost surely, 22087615380 is an apocalyptic number.

2087615380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2087615380 is an abundant number, since it is smaller than the sum of its proper divisors (2333815340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2087615380 is a wasteful number, since it uses less digits than its factorization.

2087615380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008 (or 2006 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 2087615380 is about 45690.4298513376. The cubic root of 2087615380 is about 1278.0568212308.

The spelling of 2087615380 in words is "two billion, eighty-seven million, six hundred fifteen thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 193 379 386 758 772 965 1427 1516 1895 1930 2854 3790 3860 5708 7135 7580 14270 28540 73147 146294 275411 292588 365735 540833 550822 731470 1081666 1101644 1377055 1462940 2163332 2704165 2754110 5408330 5508220 10816660 104380769 208761538 417523076 521903845 1043807690 2087615380