78502992 has 20 divisors (see below), whose sum is σ = 202799520. Its totient is φ = 26167648.

The previous prime is 78502967. The next prime is 78502997. The reversal of 78502992 is 29920587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78502997) 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 3 ways as a sum of consecutive naturals, for example, 817692 + ... + 817787.

It is an arithmetic number, because the mean of its divisors is an integer number (10139976).

Almost surely, 2^78502992 is an apocalyptic number.

It is an amenable number.

78502992 is an abundant number, since it is smaller than the sum of its proper divisors (124296528).

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

78502992 is a wasteful number, since it uses less digits than its factorization.

78502992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635490 (or 1635484 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 78502992 is about 8860.1914200541. The cubic root of 78502992 is about 428.1823254405.

The spelling of 78502992 in words is "seventy-eight million, five hundred two thousand, nine hundred ninety-two".