72403252 has 12 divisors (see below), whose sum is σ = 126812196. Its totient is φ = 36171200.

The previous prime is 72403217. The next prime is 72403291. The reversal of 72403252 is 25230427.

It can be written as a sum of positive squares in 2 ways, for example, as 15792676 + 56610576 = 3974^2 + 7524^2 .

72403252 is a modest number, since divided by 3252 gives 724 as remainder.

It is a congruent number.

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, 1753 + ... + 12160.

It is an arithmetic number, because the mean of its divisors is an integer number (10567683).

Almost surely, 2^72403252 is an apocalyptic number.

It is an amenable number.

72403252 is a deficient number, since it is larger than the sum of its proper divisors (54408944).

72403252 is a wasteful number, since it uses less digits than its factorization.

72403252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15218 (or 15216 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 72403252 is about 8509.0100481783. The cubic root of 72403252 is about 416.7919839234.

Adding to 72403252 its reverse (25230427), we get a palindrome (97633679).

The spelling of 72403252 in words is "seventy-two million, four hundred three thousand, two hundred fifty-two".