78604881 has 16 divisors (see below), whose sum is σ = 111882240. Its totient is φ = 48943440.

The previous prime is 78604853. The next prime is 78604891. The reversal of 78604881 is 18840687.

It is not a de Polignac number, because 78604881 - 2⁵ = 78604849 is a prime.

It is a super-2 number, since 2×78604881² = 12357454634048322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78604891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5665 + ... + 13758.

It is an arithmetic number, because the mean of its divisors is an integer number (6992640).

Almost surely, 2^78604881 is an apocalyptic number.

78604881 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

78604881 is a deficient number, since it is larger than the sum of its proper divisors (33277359).

78604881 is a wasteful number, since it uses less digits than its factorization.

78604881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19516.

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 78604881 is about 8865.9393749337. The cubic root of 78604881 is about 428.3674912409.

The spelling of 78604881 in words is "seventy-eight million, six hundred four thousand, eight hundred eighty-one".