90641800 has 24 divisors (see below), whose sum is σ = 210742650. Its totient is φ = 36256640.

The previous prime is 90641779. The next prime is 90641801. The reversal of 90641800 is 814609.

It can be written as a sum of positive squares in 3 ways, for example, as 53260804 + 37380996 = 7298^2 + 6114^2 .

It is not an unprimeable number, because it can be changed into a prime (90641801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 226405 + ... + 226804.

Almost surely, 2^90641800 is an apocalyptic number.

It is an amenable number.

90641800 is an abundant number, since it is smaller than the sum of its proper divisors (120100850).

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

90641800 is a wasteful number, since it uses less digits than its factorization.

90641800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453225 (or 453216 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 90641800 is about 9520.5987206688. The cubic root of 90641800 is about 449.2031990155.

The spelling of 90641800 in words is "ninety million, six hundred forty-one thousand, eight hundred".