2772079640 has 32 divisors (see below), whose sum is σ = 6804196560. Its totient is φ = 1008028800.

The previous prime is 2772079621. The next prime is 2772079643. The reversal of 2772079640 is 469702772.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 2772079591 and 2772079600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2772079643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3149651 + ... + 3150530.

Almost surely, 2^2772079640 is an apocalyptic number.

2772079640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2772079640 is an abundant number, since it is smaller than the sum of its proper divisors (4032116920).

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

2772079640 is a wasteful number, since it uses less digits than its factorization.

2772079640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6300203 (or 6300199 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 44.

The square root of 2772079640 is about 52650.5426372796. The cubic root of 2772079640 is about 1404.7592517342.

The spelling of 2772079640 in words is "two billion, seven hundred seventy-two million, seventy-nine thousand, six hundred forty".