72497872 has 10 divisors (see below), whose sum is σ = 140464658. Its totient is φ = 36248928.

The previous prime is 72497857. The next prime is 72497879. The reversal of 72497872 is 27879427.

It can be written as a sum of positive squares in only one way, i.e., 70492816 + 2005056 = 8396^2 + 1416^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72497879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2265543 + ... + 2265574.

Almost surely, 2^72497872 is an apocalyptic number.

It is an amenable number.

72497872 is a deficient number, since it is larger than the sum of its proper divisors (67966786).

72497872 is a wasteful number, since it uses less digits than its factorization.

72497872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4531125 (or 4531119 counting only the distinct ones).

The product of its digits is 395136, while the sum is 46.

The square root of 72497872 is about 8514.5682215835. The cubic root of 72497872 is about 416.9734660602.

It can be divided in two parts, 724 and 97872, that added together give a square (98596 = 314²).

The spelling of 72497872 in words is "seventy-two million, four hundred ninety-seven thousand, eight hundred seventy-two".