78494432 has 12 divisors (see below), whose sum is σ = 154535976. Its totient is φ = 39247200.

The previous prime is 78494419. The next prime is 78494441. The reversal of 78494432 is 23449487.

It is a super-2 number, since 2×78494432² = 12322751710005248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78494432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1226444 + ... + 1226507.

It is an arithmetic number, because the mean of its divisors is an integer number (12877998).

Almost surely, 2^78494432 is an apocalyptic number.

It is an amenable number.

78494432 is a deficient number, since it is larger than the sum of its proper divisors (76041544).

78494432 is a wasteful number, since it uses less digits than its factorization.

78494432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452961 (or 2452953 counting only the distinct ones).

The product of its digits is 193536, while the sum is 41.

The square root of 78494432 is about 8859.7083473442. The cubic root of 78494432 is about 428.1667618132.

The spelling of 78494432 in words is "seventy-eight million, four hundred ninety-four thousand, four hundred thirty-two".