78493152 has 24 divisors (see below), whose sum is σ = 206044776. Its totient is φ = 26164352.

The previous prime is 78493117. The next prime is 78493171. The reversal of 78493152 is 25139487.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×78493152² = 12322349821790208, 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 78493152.

It is a congruent number.

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, 408723 + ... + 408914.

It is an arithmetic number, because the mean of its divisors is an integer number (8585199).

Almost surely, 2^78493152 is an apocalyptic number.

It is an amenable number.

78493152 is an abundant number, since it is smaller than the sum of its proper divisors (127551624).

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

78493152 is a wasteful number, since it uses less digits than its factorization.

78493152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817650 (or 817642 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 78493152 is about 8859.6361099088. The cubic root of 78493152 is about 428.1644344446.

The spelling of 78493152 in words is "seventy-eight million, four hundred ninety-three thousand, one hundred fifty-two".