72757458 has 12 divisors (see below), whose sum is σ = 157641198. Its totient is φ = 24252480.

The previous prime is 72757427. The next prime is 72757459. The reversal of 72757458 is 85475727.

72757458 is a `hidden beast` number, since 7 + 27 + 574 + 58 = 666.

It can be written as a sum of positive squares in only one way, i.e., 68608089 + 4149369 = 8283^2 + 2037^2 .

It is not an unprimeable number, because it can be changed into a prime (72757459) 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 in 5 ways as a sum of consecutive naturals, for example, 2021023 + ... + 2021058.

Almost surely, 2^72757458 is an apocalyptic number.

72757458 is an abundant number, since it is smaller than the sum of its proper divisors (84883740).

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

72757458 is a wasteful number, since it uses less digits than its factorization.

72757458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042089 (or 4042086 counting only the distinct ones).

The product of its digits is 548800, while the sum is 45.

The square root of 72757458 is about 8529.7982391145. The cubic root of 72757458 is about 417.4705452107.

It can be divided in two parts, 727 and 57458, that added together give a palindrome (58185).

The spelling of 72757458 in words is "seventy-two million, seven hundred fifty-seven thousand, four hundred fifty-eight".