90728669892 has 72 divisors (see below), whose sum is σ = 246303185184. Its totient is φ = 25918303488.

The previous prime is 90728669891. The next prime is 90728669903. The reversal of 90728669892 is 29896682709.

It is not an unprimeable number, because it can be changed into a prime (90728669891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7253788 + ... + 7266284.

It is an arithmetic number, because the mean of its divisors is an integer number (3420877572).

Almost surely, 2^90728669892 is an apocalyptic number.

It is an amenable number.

90728669892 is an abundant number, since it is smaller than the sum of its proper divisors (155574515292).

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

90728669892 is a wasteful number, since it uses less digits than its factorization.

90728669892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24865 (or 24856 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 66.

The spelling of 90728669892 in words is "ninety billion, seven hundred twenty-eight million, six hundred sixty-nine thousand, eight hundred ninety-two".