72782774 has 16 divisors (see below), whose sum is σ = 112358400. Its totient is φ = 35334144.

The previous prime is 72782771. The next prime is 72782803. The reversal of 72782774 is 47728727.

It is a super-2 number, since 2×72782774² = 10594664382270152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72782771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56267 + ... + 57545.

It is an arithmetic number, because the mean of its divisors is an integer number (7022400).

Almost surely, 2^72782774 is an apocalyptic number.

72782774 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

72782774 is a deficient number, since it is larger than the sum of its proper divisors (39575626).

72782774 is a wasteful number, since it uses less digits than its factorization.

72782774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087.

The product of its digits is 307328, while the sum is 44.

The square root of 72782774 is about 8531.2820841888. The cubic root of 72782774 is about 417.5189593025.

The spelling of 72782774 in words is "seventy-two million, seven hundred eighty-two thousand, seven hundred seventy-four".