90866402 has 12 divisors (see below), whose sum is σ = 149817318. Its totient is φ = 41302800.

The previous prime is 90866383. The next prime is 90866407. The reversal of 90866402 is 20466809.

It can be written as a sum of positive squares in only one way, i.e., 85581001 + 5285401 = 9251^2 + 2299^2 .

It is not an unprimeable number, because it can be changed into a prime (90866407) 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, 187499 + ... + 187982.

Almost surely, 2^90866402 is an apocalyptic number.

90866402 is a deficient number, since it is larger than the sum of its proper divisors (58950916).

90866402 is a wasteful number, since it uses less digits than its factorization.

90866402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375505 (or 375494 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 90866402 is about 9532.3870043132. The cubic root of 90866402 is about 449.5739209775.

The spelling of 90866402 in words is "ninety million, eight hundred sixty-six thousand, four hundred two".