78120260 has 24 divisors (see below), whose sum is σ = 166744536. Its totient is φ = 30735360.

The previous prime is 78120241. The next prime is 78120271. The reversal of 78120260 is 6202187.

It can be written as a sum of positive squares in 4 ways, for example, as 7795264 + 70324996 = 2792^2 + 8386^2 .

It is a super-2 number, since 2×78120260² = 12205550044935200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30797 + ... + 33236.

It is an arithmetic number, because the mean of its divisors is an integer number (6947689).

Almost surely, 2^78120260 is an apocalyptic number.

It is an amenable number.

78120260 is an abundant number, since it is smaller than the sum of its proper divisors (88624276).

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

78120260 is a wasteful number, since it uses less digits than its factorization.

78120260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64103 (or 64101 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 78120260 is about 8838.5666258732. The cubic root of 78120260 is about 427.4853408559.

The spelling of 78120260 in words is "seventy-eight million, one hundred twenty thousand, two hundred sixty".