72793278 has 24 divisors (see below), whose sum is σ = 159494400. Its totient is φ = 23991264.

The previous prime is 72793267. The next prime is 72793291. The reversal of 72793278 is 87239727.

It is a super-2 number, since 2×72793278² = 10597722643970568, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 21118 + ... + 24321.

It is an arithmetic number, because the mean of its divisors is an integer number (6645600).

Almost surely, 2^72793278 is an apocalyptic number.

72793278 is an abundant number, since it is smaller than the sum of its proper divisors (86701122).

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

72793278 is a wasteful number, since it uses less digits than its factorization.

72793278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45536 (or 45533 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 72793278 is about 8531.8976787113. The cubic root of 72793278 is about 417.5390437627.

The spelling of 72793278 in words is "seventy-two million, seven hundred ninety-three thousand, two hundred seventy-eight".