90441990 has 24 divisors (see below), whose sum is σ = 235149408. Its totient is φ = 24117840.

The previous prime is 90441983. The next prime is 90441991. The reversal of 90441990 is 9914409.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90441991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 502366 + ... + 502545.

It is an arithmetic number, because the mean of its divisors is an integer number (9797892).

Almost surely, 2^90441990 is an apocalyptic number.

90441990 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

90441990 is an abundant number, since it is smaller than the sum of its proper divisors (144707418).

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

90441990 is a wasteful number, since it uses less digits than its factorization.

90441990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004924 (or 1004921 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 90441990 is about 9510.0993685660. The cubic root of 90441990 is about 448.8728829656.

The spelling of 90441990 in words is "ninety million, four hundred forty-one thousand, nine hundred ninety".