78791522 has 32 divisors (see below), whose sum is σ = 125452800. Its totient is φ = 37065600.

The previous prime is 78791507. The next prime is 78791527. The reversal of 78791522 is 22519787.

It is a self number, because there is not a number n which added to its sum of digits gives 78791522.

It is not an unprimeable number, because it can be changed into a prime (78791527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 601397 + ... + 601527.

It is an arithmetic number, because the mean of its divisors is an integer number (3920400).

Almost surely, 2^78791522 is an apocalyptic number.

78791522 is a deficient number, since it is larger than the sum of its proper divisors (46661278).

78791522 is a wasteful number, since it uses less digits than its factorization.

78791522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362.

The product of its digits is 70560, while the sum is 41.

The square root of 78791522 is about 8876.4588660118. The cubic root of 78791522 is about 428.7062646954.

The spelling of 78791522 in words is "seventy-eight million, seven hundred ninety-one thousand, five hundred twenty-two".