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1928923387 = 2119141817
BaseRepresentation
bin111001011111001…
…0000100011111011
311222102121110102221
41302332100203323
512422301022022
6515223304511
765541402226
oct16276204373
94872543387
101928923387
118aa910766
12459bab137
1324981c7b1
141442765bd
15b4522cc7
hex72f908fb

1928923387 has 4 divisors (see below), whose sum is σ = 1938065416. Its totient is φ = 1919781360.

The previous prime is 1928923361. The next prime is 1928923391. The reversal of 1928923387 is 7833298291.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1928923387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1928923327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4570698 + ... + 4571119.

It is an arithmetic number, because the mean of its divisors is an integer number (484516354).

Almost surely, 21928923387 is an apocalyptic number.

1928923387 is a deficient number, since it is larger than the sum of its proper divisors (9142029).

1928923387 is an equidigital number, since it uses as much as digits as its factorization.

1928923387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9142028.

The product of its digits is 1306368, while the sum is 52.

The square root of 1928923387 is about 43919.5103228622. The cubic root of 1928923387 is about 1244.8155158546.

The spelling of 1928923387 in words is "one billion, nine hundred twenty-eight million, nine hundred twenty-three thousand, three hundred eighty-seven".

Divisors: 1 211 9141817 1928923387