90345980 has 48 divisors (see below), whose sum is σ = 193751040. Its totient is φ = 35380800.

The previous prime is 90345977. The next prime is 90345989. The reversal of 90345980 is 8954309.

It is a super-2 number, since 2×90345980² = 16324792204320800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90345989) 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, 333245 + ... + 333515.

It is an arithmetic number, because the mean of its divisors is an integer number (4036480).

Almost surely, 2^90345980 is an apocalyptic number.

It is an amenable number.

90345980 is an abundant number, since it is smaller than the sum of its proper divisors (103405060).

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

90345980 is a wasteful number, since it uses less digits than its factorization.

90345980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 90345980 is about 9505.0502365848. The cubic root of 90345980 is about 448.7139908981.

The spelling of 90345980 in words is "ninety million, three hundred forty-five thousand, nine hundred eighty".