72957140 has 24 divisors (see below), whose sum is σ = 153861120. Its totient is φ = 29058848.

The previous prime is 72957107. The next prime is 72957191. The reversal of 72957140 is 4175927.

It is a self number, because there is not a number n which added to its sum of digits gives 72957140.

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 in 7 ways as a sum of consecutive naturals, for example, 2852 + ... + 12411.

It is an arithmetic number, because the mean of its divisors is an integer number (6410880).

Almost surely, 2^72957140 is an apocalyptic number.

It is an amenable number.

72957140 is an abundant number, since it is smaller than the sum of its proper divisors (80903980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72957140 is a wasteful number, since it uses less digits than its factorization.

72957140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15511 (or 15509 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 72957140 is about 8541.4951852706. The cubic root of 72957140 is about 417.8521107131.

The spelling of 72957140 in words is "seventy-two million, nine hundred fifty-seven thousand, one hundred forty".