90810490 has 16 divisors (see below), whose sum is σ = 167446440. Its totient is φ = 35438080.

The previous prime is 90810457. The next prime is 90810493. The reversal of 90810490 is 9401809.

It can be written as a sum of positive squares in 4 ways, for example, as 51710481 + 39100009 = 7191^2 + 6253^2 .

It is not an unprimeable number, because it can be changed into a prime (90810493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110335 + ... + 111154.

Almost surely, 2^90810490 is an apocalyptic number.

90810490 is a deficient number, since it is larger than the sum of its proper divisors (76635950).

90810490 is a wasteful number, since it uses less digits than its factorization.

90810490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221537.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 90810490 is about 9529.4538143589. The cubic root of 90810490 is about 449.4816913086.

The spelling of 90810490 in words is "ninety million, eight hundred ten thousand, four hundred ninety".