72468644 has 12 divisors (see below), whose sum is σ = 130247964. Its totient is φ = 35254944.

The previous prime is 72468629. The next prime is 72468667. The reversal of 72468644 is 44686427.

It can be written as a sum of positive squares in 2 ways, for example, as 67897600 + 4571044 = 8240^2 + 2138^2 .

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, 244679 + ... + 244974.

It is an arithmetic number, because the mean of its divisors is an integer number (10853997).

Almost surely, 2^72468644 is an apocalyptic number.

72468644 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

72468644 is a deficient number, since it is larger than the sum of its proper divisors (57779320).

72468644 is a wasteful number, since it uses less digits than its factorization.

72468644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489694 (or 489692 counting only the distinct ones).

The product of its digits is 258048, while the sum is 41.

The square root of 72468644 is about 8512.8516961122. The cubic root of 72468644 is about 416.9174233181.

It can be divided in two parts, 7246864 and 4, that multiplied together give a square (28987456 = 5384²).

The spelling of 72468644 in words is "seventy-two million, four hundred sixty-eight thousand, six hundred forty-four".