90871730 has 16 divisors (see below), whose sum is σ = 163863000. Its totient is φ = 36283392.

The previous prime is 90871691. The next prime is 90871799. The reversal of 90871730 is 3717809.

It can be written as a sum of positive squares in 4 ways, for example, as 74943649 + 15928081 = 8657^2 + 3991^2 .

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, 2105 + ... + 13644.

Almost surely, 2^90871730 is an apocalyptic number.

90871730 is a deficient number, since it is larger than the sum of its proper divisors (72991270).

90871730 is a wasteful number, since it uses less digits than its factorization.

90871730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16333.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 90871730 is about 9532.6664685176. Note that the first 3 decimals coincide. The cubic root of 90871730 is about 449.5827078081.

The spelling of 90871730 in words is "ninety million, eight hundred seventy-one thousand, seven hundred thirty".