75431990 has 32 divisors (see below), whose sum is σ = 142490880. Its totient is φ = 28713600.

The previous prime is 75431989. The next prime is 75432001. The reversal of 75431990 is 9913457.

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, 16916 + ... + 20904.

It is an arithmetic number, because the mean of its divisors is an integer number (4452840).

Almost surely, 2^75431990 is an apocalyptic number.

75431990 is a deficient number, since it is larger than the sum of its proper divisors (67058890).

75431990 is a wasteful number, since it uses less digits than its factorization.

75431990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4088.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 75431990 is about 8685.1591810398. The cubic root of 75431990 is about 422.5244596789.

The spelling of 75431990 in words is "seventy-five million, four hundred thirty-one thousand, nine hundred ninety".