72800078 has 8 divisors (see below), whose sum is σ = 117600168. Its totient is φ = 33600024.

The previous prime is 72800033. The next prime is 72800087. The reversal of 72800078 is 87000827.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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, 1399976 + ... + 1400027.

It is an arithmetic number, because the mean of its divisors is an integer number (14700021).

Almost surely, 2^72800078 is an apocalyptic number.

72800078 is a deficient number, since it is larger than the sum of its proper divisors (44800090).

72800078 is a wasteful number, since it uses less digits than its factorization.

72800078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800018.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 72800078 is about 8532.2961739499. The cubic root of 72800078 is about 417.5520448583.

The spelling of 72800078 in words is "seventy-two million, eight hundred thousand, seventy-eight".