78812480 has 28 divisors (see below), whose sum is σ = 187672980. Its totient is φ = 31524864.

The previous prime is 78812443. The next prime is 78812497. The reversal of 78812480 is 8421887.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 54051904 + 24760576 = 7352^2 + 4976^2 .

It is a super-2 number, since 2×78812480² = 12422814007500800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122825 + ... + 123464.

Almost surely, 2^78812480 is an apocalyptic number.

It is an amenable number.

78812480 is an abundant number, since it is smaller than the sum of its proper divisors (108860500).

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

78812480 is a wasteful number, since it uses less digits than its factorization.

78812480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246306 (or 246296 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 78812480 is about 8877.6393258568. The cubic root of 78812480 is about 428.7442722930.

The spelling of 78812480 in words is "seventy-eight million, eight hundred twelve thousand, four hundred eighty".