78868530 has 48 divisors (see below), whose sum is σ = 220835160. Its totient is φ = 19413504.

The previous prime is 78868519. The next prime is 78868597. The reversal of 78868530 is 3586887.

It can be written as a sum of positive squares in 4 ways, for example, as 55219761 + 23648769 = 7431^2 + 4863^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32535 + ... + 34874.

Almost surely, 2^78868530 is an apocalyptic number.

78868530 is an abundant number, since it is smaller than the sum of its proper divisors (141966630).

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

78868530 is a wasteful number, since it uses less digits than its factorization.

78868530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67435 (or 67432 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 78868530 is about 8880.7955724698. The cubic root of 78868530 is about 428.8458865800.

The spelling of 78868530 in words is "seventy-eight million, eight hundred sixty-eight thousand, five hundred thirty".