78565480 has 32 divisors (see below), whose sum is σ = 202026240. Its totient is φ = 26936640.

The previous prime is 78565477. The next prime is 78565507. The reversal of 78565480 is 8456587.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

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, 140016 + ... + 140575.

It is an arithmetic number, because the mean of its divisors is an integer number (6313320).

Almost surely, 2^78565480 is an apocalyptic number.

78565480 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78565480 is an abundant number, since it is smaller than the sum of its proper divisors (123460760).

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

78565480 is a wasteful number, since it uses less digits than its factorization.

78565480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280609 (or 280605 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 43.

The square root of 78565480 is about 8863.7170532458. The cubic root of 78565480 is about 428.2959056592.

The spelling of 78565480 in words is "seventy-eight million, five hundred sixty-five thousand, four hundred eighty".