90502837920 has 192 divisors, whose sum is σ = 345556471680. Its totient is φ = 21940070400.

The previous prime is 90502837913. The next prime is 90502837927. The reversal of 90502837920 is 2973820509.

90502837920 is a `hidden beast` number, since 90 + 502 + 8 + 37 + 9 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (90502837913) and next prime (90502837927).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (90502837927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 904741 + ... + 999780.

It is an arithmetic number, because the mean of its divisors is an integer number (1799773290).

Almost surely, 2^90502837920 is an apocalyptic number.

90502837920 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

90502837920 is an abundant number, since it is smaller than the sum of its proper divisors (255053633760).

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

90502837920 is a wasteful number, since it uses less digits than its factorization.

90502837920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904556 (or 1904542 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 90502837920 in words is "ninety billion, five hundred two million, eight hundred thirty-seven thousand, nine hundred twenty".