123272644 has 48 divisors (see below), whose sum is σ = 251899200. Its totient is φ = 52162560.

The previous prime is 123272603. The next prime is 123272651. The reversal of 123272644 is 446272321.

It is a happy number.

It is a super-2 number, since 2×123272644² = 30392289517501472, which contains 22 as substring.

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, 71707 + ... + 73405.

It is an arithmetic number, because the mean of its divisors is an integer number (5247900).

Almost surely, 2^123272644 is an apocalyptic number.

It is an amenable number.

123272644 is an abundant number, since it is smaller than the sum of its proper divisors (128626556).

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

123272644 is a wasteful number, since it uses less digits than its factorization.

123272644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828 (or 1826 counting only the distinct ones).

The product of its digits is 16128, while the sum is 31.

The square root of 123272644 is about 11102.8214432188. The cubic root of 123272644 is about 497.6861675425.

The spelling of 123272644 in words is "one hundred twenty-three million, two hundred seventy-two thousand, six hundred forty-four".