90440730492 has 24 divisors (see below), whose sum is σ = 241175281536. Its totient is φ = 25840208688.

The previous prime is 90440730469. The next prime is 90440730503. The reversal of 90440730492 is 29403704409.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538337598 + ... + 538337765.

It is an arithmetic number, because the mean of its divisors is an integer number (10048970064).

Almost surely, 2^90440730492 is an apocalyptic number.

It is an amenable number.

90440730492 is an abundant number, since it is smaller than the sum of its proper divisors (150734551044).

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

90440730492 is a wasteful number, since it uses less digits than its factorization.

90440730492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076675377 (or 1076675375 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 90440730492 in words is "ninety billion, four hundred forty million, seven hundred thirty thousand, four hundred ninety-two".