75507990 has 32 divisors (see below), whose sum is σ = 181681920. Its totient is φ = 20084064.

The previous prime is 75507989. The next prime is 75508039. The reversal of 75507990 is 9970557.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9567 + ... + 15573.

It is an arithmetic number, because the mean of its divisors is an integer number (5677560).

Almost surely, 2^75507990 is an apocalyptic number.

75507990 is an abundant number, since it is smaller than the sum of its proper divisors (106173930).

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

75507990 is a wasteful number, since it uses less digits than its factorization.

75507990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6436.

The product of its (nonzero) digits is 99225, while the sum is 42.

The square root of 75507990 is about 8689.5333591626. The cubic root of 75507990 is about 422.6663140849. Note that the first 3 decimals are identical.

The spelling of 75507990 in words is "seventy-five million, five hundred seven thousand, nine hundred ninety".