90890490 has 32 divisors (see below), whose sum is σ = 229619520. Its totient is φ = 22961664.

The previous prime is 90890489. The next prime is 90890491. The reversal of 90890490 is 9409809.

It is an interprime number because it is at equal distance from previous prime (90890489) and next prime (90890491).

It is a super-2 number, since 2×90890490² = 16522162344880200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90890491) 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, 79159 + ... + 80298.

It is an arithmetic number, because the mean of its divisors is an integer number (7175610).

Almost surely, 2^90890490 is an apocalyptic number.

90890490 is an abundant number, since it is smaller than the sum of its proper divisors (138729030).

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

90890490 is a wasteful number, since it uses less digits than its factorization.

90890490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159486.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 90890490 is about 9533.6504026527. The cubic root of 90890490 is about 449.6136436898.

The spelling of 90890490 in words is "ninety million, eight hundred ninety thousand, four hundred ninety".