90402268 has 12 divisors (see below), whose sum is σ = 172586232. Its totient is φ = 41091920.

The previous prime is 90402239. The next prime is 90402269. The reversal of 90402268 is 86220409.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90402269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1027255 + ... + 1027342.

It is an arithmetic number, because the mean of its divisors is an integer number (14382186).

Almost surely, 2^90402268 is an apocalyptic number.

It is an amenable number.

90402268 is a deficient number, since it is larger than the sum of its proper divisors (82183964).

90402268 is a wasteful number, since it uses less digits than its factorization.

90402268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054612 (or 2054610 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 90402268 is about 9508.0107278021. The cubic root of 90402268 is about 448.8071585544.

The spelling of 90402268 in words is "ninety million, four hundred two thousand, two hundred sixty-eight".