78534880 has 48 divisors (see below), whose sum is σ = 193614624. Its totient is φ = 30046720.

The previous prime is 78534853. The next prime is 78534881. The reversal of 78534880 is 8843587.

It is a happy number.

It is a super-2 number, since 2×78534880² = 12335454753228800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78534881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6991 + ... + 14350.

It is an arithmetic number, because the mean of its divisors is an integer number (4033638).

Almost surely, 2^78534880 is an apocalyptic number.

It is an amenable number.

78534880 is an abundant number, since it is smaller than the sum of its proper divisors (115079744).

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

78534880 is a wasteful number, since it uses less digits than its factorization.

78534880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21379 (or 21371 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 78534880 is about 8861.9907470049. The cubic root of 78534880 is about 428.2402936331.

The spelling of 78534880 in words is "seventy-eight million, five hundred thirty-four thousand, eight hundred eighty".