72040372 has 6 divisors (see below), whose sum is σ = 126070658. Its totient is φ = 36020184.

The previous prime is 72040349. The next prime is 72040391. The reversal of 72040372 is 27304027.

It can be written as a sum of positive squares in only one way, i.e., 50751376 + 21288996 = 7124^2 + 4614^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9005043 + ... + 9005050.

Almost surely, 2^72040372 is an apocalyptic number.

It is an amenable number.

72040372 is a deficient number, since it is larger than the sum of its proper divisors (54030286).

72040372 is a wasteful number, since it uses less digits than its factorization.

72040372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18010097 (or 18010095 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 72040372 is about 8487.6599837647. The cubic root of 72040372 is about 416.0945066965.

Adding to 72040372 its reverse (27304027), we get a palindrome (99344399).

The spelling of 72040372 in words is "seventy-two million, forty thousand, three hundred seventy-two".