900520090 has 16 divisors (see below), whose sum is σ = 1716285672. Its totient is φ = 339019264.

The previous prime is 900520079. The next prime is 900520139. The reversal of 900520090 is 90025009.

It can be written as a sum of positive squares in 4 ways, for example, as 827195121 + 73324969 = 28761^2 + 8563^2 .

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, 2648419 + ... + 2648758.

Almost surely, 2^900520090 is an apocalyptic number.

900520090 is a deficient number, since it is larger than the sum of its proper divisors (815765582).

900520090 is a wasteful number, since it uses less digits than its factorization.

900520090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5297201.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 900520090 is about 30008.6669147431. Note that the first 3 decimals coincide. The cubic root of 900520090 is about 965.6753270796.

Adding to 900520090 its reverse (90025009), we get a palindrome (990545099).

The spelling of 900520090 in words is "nine hundred million, five hundred twenty thousand, ninety".