78020264 has 16 divisors (see below), whose sum is σ = 167186400. Its totient is φ = 33437232.

The previous prime is 78020263. The next prime is 78020269. The reversal of 78020264 is 46202087.

It is not an unprimeable number, because it can be changed into a prime (78020263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696554 + ... + 696665.

It is an arithmetic number, because the mean of its divisors is an integer number (10449150).

Almost surely, 2^78020264 is an apocalyptic number.

It is an amenable number.

78020264 is an abundant number, since it is smaller than the sum of its proper divisors (89166136).

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

78020264 is a wasteful number, since it uses less digits than its factorization.

78020264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393232 (or 1393228 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 78020264 is about 8832.9080149179. The cubic root of 78020264 is about 427.3028654599.

The spelling of 78020264 in words is "seventy-eight million, twenty thousand, two hundred sixty-four".