72557074 has 16 divisors (see below), whose sum is σ = 112779288. Its totient is φ = 34981632.

The previous prime is 72557059. The next prime is 72557077. The reversal of 72557074 is 47075527.

It can be written as a sum of positive squares in 4 ways, for example, as 48399849 + 24157225 = 6957^2 + 4915^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (72557077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4024 + ... + 12700.

Almost surely, 2^72557074 is an apocalyptic number.

72557074 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

72557074 is a deficient number, since it is larger than the sum of its proper divisors (40222214).

72557074 is a wasteful number, since it uses less digits than its factorization.

72557074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8829.

The product of its (nonzero) digits is 68600, while the sum is 37.

The square root of 72557074 is about 8518.0440243051. The cubic root of 72557074 is about 417.0869358125.

The spelling of 72557074 in words is "seventy-two million, five hundred fifty-seven thousand, seventy-four".