90498978 has 32 divisors (see below), whose sum is σ = 201427200. Its totient is φ = 30118608.

The previous prime is 90498959. The next prime is 90499001. The reversal of 90498978 is 87989409.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55300 + ... + 56912.

It is an arithmetic number, because the mean of its divisors is an integer number (6294600).

Almost surely, 2^90498978 is an apocalyptic number.

90498978 is an abundant number, since it is smaller than the sum of its proper divisors (110928222).

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

90498978 is a wasteful number, since it uses less digits than its factorization.

90498978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2663 (or 2657 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 90498978 is about 9513.0950799411. The cubic root of 90498978 is about 448.9671422691.

The spelling of 90498978 in words is "ninety million, four hundred ninety-eight thousand, nine hundred seventy-eight".