90404138 has 8 divisors (see below), whose sum is σ = 147934080. Its totient is φ = 41092780.

The previous prime is 90404137. The next prime is 90404141. The reversal of 90404138 is 83140409.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 90404138.

It is not an unprimeable number, because it can be changed into a prime (90404131) 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, 2054618 + ... + 2054661.

It is an arithmetic number, because the mean of its divisors is an integer number (18491760).

Almost surely, 2^90404138 is an apocalyptic number.

90404138 is a deficient number, since it is larger than the sum of its proper divisors (57529942).

90404138 is a wasteful number, since it uses less digits than its factorization.

90404138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4109292.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 90404138 is about 9508.1090654241. The cubic root of 90404138 is about 448.8102531065.

The spelling of 90404138 in words is "ninety million, four hundred four thousand, one hundred thirty-eight".