72774330 has 32 divisors (see below), whose sum is σ = 178377984. Its totient is φ = 18993216.

The previous prime is 72774319. The next prime is 72774349. The reversal of 72774330 is 3347727.

It is a super-2 number, since 2×72774330² = 10592206213897800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72774291 and 72774300.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24397 + ... + 27216.

It is an arithmetic number, because the mean of its divisors is an integer number (5574312).

Almost surely, 2^72774330 is an apocalyptic number.

72774330 is an abundant number, since it is smaller than the sum of its proper divisors (105603654).

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

72774330 is a wasteful number, since it uses less digits than its factorization.

72774330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51670.

The product of its (nonzero) digits is 24696, while the sum is 33.

The square root of 72774330 is about 8530.7871852485. The cubic root of 72774330 is about 417.5028123204.

It can be divided in two parts, 727 and 74330, that added together give a palindrome (75057).

The spelling of 72774330 in words is "seventy-two million, seven hundred seventy-four thousand, three hundred thirty".