72144488 has 16 divisors (see below), whose sum is σ = 145676580. Its totient is φ = 33297408.

The previous prime is 72144469. The next prime is 72144521. The reversal of 72144488 is 88444127.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 70930084 + 1214404 = 8422^2 + 1102^2 .

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, 346745 + ... + 346952.

Almost surely, 2^72144488 is an apocalyptic number.

It is an amenable number.

72144488 is an abundant number, since it is smaller than the sum of its proper divisors (73532092).

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

72144488 is a wasteful number, since it uses less digits than its factorization.

72144488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693716 (or 693712 counting only the distinct ones).

The product of its digits is 57344, while the sum is 38.

The square root of 72144488 is about 8493.7911441240. The cubic root of 72144488 is about 416.2948630655.

The spelling of 72144488 in words is "seventy-two million, one hundred forty-four thousand, four hundred eighty-eight".