90865580 has 24 divisors (see below), whose sum is σ = 205496592. Its totient is φ = 33550272.

The previous prime is 90865547. The next prime is 90865631. The reversal of 90865580 is 8556809.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174482 + ... + 175001.

It is an arithmetic number, because the mean of its divisors is an integer number (8562358).

Almost surely, 2^90865580 is an apocalyptic number.

It is an amenable number.

90865580 is an abundant number, since it is smaller than the sum of its proper divisors (114631012).

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

90865580 is a wasteful number, since it uses less digits than its factorization.

90865580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349505 (or 349503 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 90865580 is about 9532.3438880477. The cubic root of 90865580 is about 449.5725653211.

The spelling of 90865580 in words is "ninety million, eight hundred sixty-five thousand, five hundred eighty".