90909380 has 12 divisors (see below), whose sum is σ = 190909740. Its totient is φ = 36363744.

The previous prime is 90909373. The next prime is 90909463. The reversal of 90909380 is 8390909.

It can be written as a sum of positive squares in 2 ways, for example, as 11235904 + 79673476 = 3352^2 + 8926^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2272715 + ... + 2272754.

It is an arithmetic number, because the mean of its divisors is an integer number (15909145).

Almost surely, 2^90909380 is an apocalyptic number.

It is an amenable number.

90909380 is an abundant number, since it is smaller than the sum of its proper divisors (100000360).

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

90909380 is a wasteful number, since it uses less digits than its factorization.

90909380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4545478 (or 4545476 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 90909380 is about 9534.6410524990. The cubic root of 90909380 is about 449.6447896451.

The spelling of 90909380 in words is "ninety million, nine hundred nine thousand, three hundred eighty".