90928381920 has 48 divisors (see below), whose sum is σ = 286424404560. Its totient is φ = 24247568384.

The previous prime is 90928381867. The next prime is 90928381937. The reversal of 90928381920 is 2918382909.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94716585 + ... + 94717544.

It is an arithmetic number, because the mean of its divisors is an integer number (5967175095).

Almost surely, 2^90928381920 is an apocalyptic number.

It is an amenable number.

90928381920 is an abundant number, since it is smaller than the sum of its proper divisors (195496022640).

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

90928381920 is a wasteful number, since it uses less digits than its factorization.

90928381920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189434147 (or 189434139 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 51.

The spelling of 90928381920 in words is "ninety billion, nine hundred twenty-eight million, three hundred eighty-one thousand, nine hundred twenty".