78111532 has 24 divisors (see below), whose sum is σ = 145118736. Its totient is φ = 36661248.

The previous prime is 78111511. The next prime is 78111541. The reversal of 78111532 is 23511187.

It is a super-2 number, since 2×78111532² = 12202822862774048, 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 78111532.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28828 + ... + 31420.

It is an arithmetic number, because the mean of its divisors is an integer number (6046614).

Almost surely, 2^78111532 is an apocalyptic number.

It is an amenable number.

78111532 is a deficient number, since it is larger than the sum of its proper divisors (67007204).

78111532 is a wasteful number, since it uses less digits than its factorization.

78111532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3057 (or 3055 counting only the distinct ones).

The product of its digits is 1680, while the sum is 28.

The square root of 78111532 is about 8838.0728668641. The cubic root of 78111532 is about 427.4694199710.

The spelling of 78111532 in words is "seventy-eight million, one hundred eleven thousand, five hundred thirty-two".