90544431628 has 48 divisors (see below), whose sum is σ = 182991461184. Its totient is φ = 38398187520.

The previous prime is 90544431623. The next prime is 90544431647. The reversal of 90544431628 is 82613444509.

It is not an unprimeable number, because it can be changed into a prime (90544431623) 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, 1928998 + ... + 1975378.

It is an arithmetic number, because the mean of its divisors is an integer number (3812322108).

Almost surely, 2^90544431628 is an apocalyptic number.

It is an amenable number.

90544431628 is an abundant number, since it is smaller than the sum of its proper divisors (92447029556).

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

90544431628 is a wasteful number, since it uses less digits than its factorization.

90544431628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47122 (or 47120 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 90544431628 in words is "ninety billion, five hundred forty-four million, four hundred thirty-one thousand, six hundred twenty-eight".