72274556 has 48 divisors (see below), whose sum is σ = 140313600. Its totient is φ = 32421312.

The previous prime is 72274519. The next prime is 72274577. The reversal of 72274556 is 65547227.

It is a happy number.

It is a super-2 number, since 2×72274556² = 10447222889994272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

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, 302285 + ... + 302523.

It is an arithmetic number, because the mean of its divisors is an integer number (2923200).

Almost surely, 2^72274556 is an apocalyptic number.

72274556 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

72274556 is a deficient number, since it is larger than the sum of its proper divisors (68039044).

72274556 is a wasteful number, since it uses less digits than its factorization.

72274556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 456 counting only the distinct ones).

The product of its digits is 117600, while the sum is 38.

The square root of 72274556 is about 8501.4443478741. Note that the first 3 decimals coincide. The cubic root of 72274556 is about 416.5448897101.

The spelling of 72274556 in words is "seventy-two million, two hundred seventy-four thousand, five hundred fifty-six".