72644424 has 16 divisors (see below), whose sum is σ = 181611120. Its totient is φ = 24214800.

The previous prime is 72644393. The next prime is 72644443. The reversal of 72644424 is 42444627.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513402 + ... + 1513449.

It is an arithmetic number, because the mean of its divisors is an integer number (11350695).

Almost surely, 2^72644424 is an apocalyptic number.

It is an amenable number.

72644424 is an abundant number, since it is smaller than the sum of its proper divisors (108966696).

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

72644424 is a wasteful number, since it uses less digits than its factorization.

72644424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026860 (or 3026856 counting only the distinct ones).

The product of its digits is 43008, while the sum is 33.

The square root of 72644424 is about 8523.1698328732. The cubic root of 72644424 is about 417.2542428784.

It can be divided in two parts, 726 and 44424, that added together give a triangular number (45150 = T₃₀₀).

The spelling of 72644424 in words is "seventy-two million, six hundred forty-four thousand, four hundred twenty-four".