72737445 has 32 divisors (see below), whose sum is σ = 127401984. Its totient is φ = 35144000.

The previous prime is 72737443. The next prime is 72737447. The reversal of 72737445 is 54473727.

It is an interprime number because it is at equal distance from previous prime (72737443) and next prime (72737447).

It is not a de Polignac number, because 72737445 - 2¹ = 72737443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72737443) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 62620 + ... + 63770.

It is an arithmetic number, because the mean of its divisors is an integer number (3981312).

Almost surely, 2^72737445 is an apocalyptic number.

It is an amenable number.

72737445 is a deficient number, since it is larger than the sum of its proper divisors (54664539).

72737445 is a wasteful number, since it uses less digits than its factorization.

72737445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553.

The product of its digits is 164640, while the sum is 39.

The square root of 72737445 is about 8528.6250357253. The cubic root of 72737445 is about 417.4322645798.

The spelling of 72737445 in words is "seventy-two million, seven hundred thirty-seven thousand, four hundred forty-five".