78120868 has 24 divisors (see below), whose sum is σ = 161283584. Its totient is φ = 32400000.

The previous prime is 78120863. The next prime is 78120869. The reversal of 78120868 is 86802187.

It is a super-2 number, since 2×78120868² = 12205740034146848, 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 78120868.

It is not an unprimeable number, because it can be changed into a prime (78120863) 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, 44133 + ... + 45868.

Almost surely, 2^78120868 is an apocalyptic number.

It is an amenable number.

78120868 is an abundant number, since it is smaller than the sum of its proper divisors (83162716).

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

78120868 is a wasteful number, since it uses less digits than its factorization.

78120868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90043 (or 90041 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 78120868 is about 8838.6010205236. The cubic root of 78120868 is about 427.4864498743.

The spelling of 78120868 in words is "seventy-eight million, one hundred twenty thousand, eight hundred sixty-eight".