78730560 has 84 divisors (see below), whose sum is σ = 270810228. Its totient is φ = 20994048.

The previous prime is 78730559. The next prime is 78730567. The reversal of 78730560 is 6503787.

It can be written as a sum of positive squares in 2 ways, for example, as 54287424 + 24443136 = 7368^2 + 4944^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78730567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10789 + ... + 16548.

Almost surely, 2^78730560 is an apocalyptic number.

It is an amenable number.

78730560 is an abundant number, since it is smaller than the sum of its proper divisors (192079668).

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

78730560 is a wasteful number, since it uses less digits than its factorization.

78730560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27360 (or 27347 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 78730560 is about 8873.0242871301. The cubic root of 78730560 is about 428.5956710096.

The spelling of 78730560 in words is "seventy-eight million, seven hundred thirty thousand, five hundred sixty".