90409684 has 12 divisors (see below), whose sum is σ = 158302144. Its totient is φ = 45180504.

The previous prime is 90409673. The next prime is 90409699. The reversal of 90409684 is 48690409.

It is a super-3 number, since 3×90409684³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4207 + ... + 14089.

Almost surely, 2^90409684 is an apocalyptic number.

It is an amenable number.

90409684 is a deficient number, since it is larger than the sum of its proper divisors (67892460).

90409684 is a wasteful number, since it uses less digits than its factorization.

90409684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12174 (or 12172 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 90409684 is about 9508.4007067435. The cubic root of 90409684 is about 448.8194306023.

The spelling of 90409684 in words is "ninety million, four hundred nine thousand, six hundred eighty-four".