27906779392 has 36 divisors (see below), whose sum is σ = 55905789436. Its totient is φ = 13902981120.

The previous prime is 27906779347. The next prime is 27906779393. The reversal of 27906779392 is 29397760972.

It can be written as a sum of positive squares in 2 ways, for example, as 17483186176 + 10423593216 = 132224^2 + 102096^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 27906779392.

It is not an unprimeable number, because it can be changed into a prime (27906779393) 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 3 ways as a sum of consecutive naturals, for example, 125859 + ... + 267682.

Almost surely, 2^27906779392 is an apocalyptic number.

It is an amenable number.

27906779392 is an abundant number, since it is smaller than the sum of its proper divisors (27999010044).

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

27906779392 is an equidigital number, since it uses as much as digits as its factorization.

27906779392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393834 (or 393820 counting only the distinct ones).

The product of its (nonzero) digits is 18003384, while the sum is 61.

The spelling of 27906779392 in words is "twenty-seven billion, nine hundred six million, seven hundred seventy-nine thousand, three hundred ninety-two".