78812432 has 20 divisors (see below), whose sum is σ = 152894976. Its totient is φ = 39355680.

The previous prime is 78812429. The next prime is 78812441. The reversal of 78812432 is 23421887.

It is a super-2 number, since 2×78812432² = 12422798875509248, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 78812392 and 78812401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11873 + ... + 17279.

Almost surely, 2^78812432 is an apocalyptic number.

It is an amenable number.

78812432 is a deficient number, since it is larger than the sum of its proper divisors (74082544).

78812432 is a wasteful number, since it uses less digits than its factorization.

78812432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6326 (or 6320 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 78812432 is about 8877.6366224350. The cubic root of 78812432 is about 428.7441852521.

The spelling of 78812432 in words is "seventy-eight million, eight hundred twelve thousand, four hundred thirty-two".