78452788 has 12 divisors (see below), whose sum is σ = 138835620. Its totient is φ = 38785472.

The previous prime is 78452783. The next prime is 78452809. The reversal of 78452788 is 88725487.

It can be written as a sum of positive squares in 2 ways, for example, as 39664804 + 38787984 = 6298^2 + 6228^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78452783) 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 3 ways as a sum of consecutive naturals, for example, 109831 + ... + 110542.

It is an arithmetic number, because the mean of its divisors is an integer number (11569635).

Almost surely, 2^78452788 is an apocalyptic number.

It is an amenable number.

78452788 is a deficient number, since it is larger than the sum of its proper divisors (60382832).

78452788 is a wasteful number, since it uses less digits than its factorization.

78452788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220466 (or 220464 counting only the distinct ones).

The product of its digits is 1003520, while the sum is 49.

The square root of 78452788 is about 8857.3578453171. The cubic root of 78452788 is about 428.0910293468.

The spelling of 78452788 in words is "seventy-eight million, four hundred fifty-two thousand, seven hundred eighty-eight".