90391240790 has 32 divisors (see below), whose sum is σ = 163283052960. Its totient is φ = 36027963904.

The previous prime is 90391240741. The next prime is 90391240817. The reversal of 90391240790 is 9704219309.

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, 11595134 + ... + 11602926.

It is an arithmetic number, because the mean of its divisors is an integer number (5102595405).

Almost surely, 2^90391240790 is an apocalyptic number.

90391240790 is a deficient number, since it is larger than the sum of its proper divisors (72891812170).

90391240790 is a wasteful number, since it uses less digits than its factorization.

90391240790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11776.

The product of its (nonzero) digits is 122472, while the sum is 44.

The spelling of 90391240790 in words is "ninety billion, three hundred ninety-one million, two hundred forty thousand, seven hundred ninety".