72037844 has 6 divisors (see below), whose sum is σ = 126066234. Its totient is φ = 36018920.

The previous prime is 72037813. The next prime is 72037877. The reversal of 72037844 is 44873027.

It can be written as a sum of positive squares in only one way, i.e., 52128400 + 19909444 = 7220^2 + 4462^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9004727 + ... + 9004734.

It is an arithmetic number, because the mean of its divisors is an integer number (21011039).

Almost surely, 2^72037844 is an apocalyptic number.

It is an amenable number.

72037844 is a deficient number, since it is larger than the sum of its proper divisors (54028390).

72037844 is a wasteful number, since it uses less digits than its factorization.

72037844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18009465 (or 18009463 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 72037844 is about 8487.5110603757. The cubic root of 72037844 is about 416.0896395219.

The spelling of 72037844 in words is "seventy-two million, thirty-seven thousand, eight hundred forty-four".