90888660 has 36 divisors (see below), whose sum is σ = 275696148. Its totient is φ = 24236928.

The previous prime is 90888643. The next prime is 90888661. The reversal of 90888660 is 6688809.

It can be written as a sum of positive squares in 2 ways, for example, as 46212804 + 44675856 = 6798^2 + 6684^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90888661) 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, 252289 + ... + 252648.

Almost surely, 2^90888660 is an apocalyptic number.

90888660 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

90888660 is an abundant number, since it is smaller than the sum of its proper divisors (184807488).

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

90888660 is a wasteful number, since it uses less digits than its factorization.

90888660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504952 (or 504947 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 90888660 is about 9533.5544263407. The cubic root of 90888660 is about 449.6106261446.

The spelling of 90888660 in words is "ninety million, eight hundred eighty-eight thousand, six hundred sixty".