90504440 has 32 divisors (see below), whose sum is σ = 219300480. Its totient is φ = 33416832.

The previous prime is 90504437. The next prime is 90504461. The reversal of 90504440 is 4440509.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

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, 86504 + ... + 87543.

It is an arithmetic number, because the mean of its divisors is an integer number (6853140).

Almost surely, 2^90504440 is an apocalyptic number.

It is an amenable number.

90504440 is an abundant number, since it is smaller than the sum of its proper divisors (128796040).

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

90504440 is a wasteful number, since it uses less digits than its factorization.

90504440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174071 (or 174067 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 90504440 is about 9513.3821535771. The cubic root of 90504440 is about 448.9761744492.

Adding to 90504440 its reverse (4440509), we get a palindrome (94944949).

The spelling of 90504440 in words is "ninety million, five hundred four thousand, four hundred forty".