90856090 has 48 divisors (see below), whose sum is σ = 182000088. Its totient is φ = 32617728.

The previous prime is 90856067. The next prime is 90856121. The reversal of 90856090 is 9065809.

It can be written as a sum of positive squares in 12 ways, for example, as 18826921 + 72029169 = 4339^2 + 8487^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61804 + ... + 63256.

Almost surely, 2^90856090 is an apocalyptic number.

90856090 is an abundant number, since it is smaller than the sum of its proper divisors (91143998).

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

90856090 is a wasteful number, since it uses less digits than its factorization.

90856090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523 (or 1510 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 90856090 is about 9531.8460961138. The cubic root of 90856090 is about 449.5569136585.

The spelling of 90856090 in words is "ninety million, eight hundred fifty-six thousand, ninety".