72190755 has 144 divisors (see below), whose sum is σ = 166281024. Its totient is φ = 28200960.

The previous prime is 72190751. The next prime is 72190763. The reversal of 72190755 is 55709127.

It is not a de Polignac number, because 72190755 - 2² = 72190751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72190751) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1183425 + ... + 1183485.

Almost surely, 2^72190755 is an apocalyptic number.

72190755 is an abundant number, since it is smaller than the sum of its proper divisors (94090269).

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

72190755 is a wasteful number, since it uses less digits than its factorization.

72190755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 72190755 is about 8496.5142852819. The cubic root of 72190755 is about 416.3838354368.

The spelling of 72190755 in words is "seventy-two million, one hundred ninety thousand, seven hundred fifty-five".