90688973908 has 48 divisors (see below), whose sum is σ = 181640808720. Its totient is φ = 39247755264.

The previous prime is 90688973897. The next prime is 90688973909. The reversal of 90688973908 is 80937988609.

It can be written as a sum of positive squares in 8 ways, for example, as 2799256464 + 87889717444 = 52908^2 + 296462^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90688973909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47110 + ... + 428482.

It is an arithmetic number, because the mean of its divisors is an integer number (3784183515).

Almost surely, 2^90688973908 is an apocalyptic number.

It is an amenable number.

90688973908 is an abundant number, since it is smaller than the sum of its proper divisors (90951834812).

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

90688973908 is a wasteful number, since it uses less digits than its factorization.

90688973908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381676 (or 381674 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 67.

The spelling of 90688973908 in words is "ninety billion, six hundred eighty-eight million, nine hundred seventy-three thousand, nine hundred eight".