72801700 has 18 divisors (see below), whose sum is σ = 157979906. Its totient is φ = 29120640.

The previous prime is 72801697. The next prime is 72801713. The reversal of 72801700 is 710827.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 15163236 + 57638464 = 3894^2 + 7592^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 363909 + ... + 364108.

Almost surely, 2^72801700 is an apocalyptic number.

It is an amenable number.

72801700 is an abundant number, since it is smaller than the sum of its proper divisors (85178206).

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

72801700 is a wasteful number, since it uses less digits than its factorization.

72801700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728031 (or 728024 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 72801700 is about 8532.3912240356. The cubic root of 72801700 is about 417.5551458824. Note that the first 3 decimals are identical.

The spelling of 72801700 in words is "seventy-two million, eight hundred one thousand, seven hundred".