90988940 has 24 divisors (see below), whose sum is σ = 218373792. Its totient is φ = 31196160.

The previous prime is 90988939. The next prime is 90988951. The reversal of 90988940 is 4988909.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

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, 324821 + ... + 325100.

It is an arithmetic number, because the mean of its divisors is an integer number (9098908).

Almost surely, 2^90988940 is an apocalyptic number.

It is an amenable number.

90988940 is an abundant number, since it is smaller than the sum of its proper divisors (127384852).

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

90988940 is a wasteful number, since it uses less digits than its factorization.

90988940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649937 (or 649935 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 90988940 is about 9538.8122950397. The cubic root of 90988940 is about 449.7759213598.

The spelling of 90988940 in words is "ninety million, nine hundred eighty-eight thousand, nine hundred forty".