90581982 has 32 divisors (see below), whose sum is σ = 185286528. Its totient is φ = 29511456.

The previous prime is 90581971. The next prime is 90581983. The reversal of 90581982 is 28918509.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90581983) 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, 140553 + ... + 141195.

It is an arithmetic number, because the mean of its divisors is an integer number (5790204).

Almost surely, 2^90581982 is an apocalyptic number.

90581982 is an abundant number, since it is smaller than the sum of its proper divisors (94704546).

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

90581982 is a wasteful number, since it uses less digits than its factorization.

90581982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144.

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 90581982 is about 9517.4566980890. The cubic root of 90581982 is about 449.1043617974.

The spelling of 90581982 in words is "ninety million, five hundred eighty-one thousand, nine hundred eighty-two".