90340432138 has 16 divisors (see below), whose sum is σ = 150975114624. Its totient is φ = 40190133760.

The previous prime is 90340432123. The next prime is 90340432157. The reversal of 90340432138 is 83123404309.

It is a super-2 number, since 2×90340432138² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90340432097 and 90340432106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43683895 + ... + 43685962.

It is an arithmetic number, because the mean of its divisors is an integer number (9435944664).

Almost surely, 2^90340432138 is an apocalyptic number.

90340432138 is a deficient number, since it is larger than the sum of its proper divisors (60634682486).

90340432138 is a wasteful number, since it uses less digits than its factorization.

90340432138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87369917.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 90340432138 in words is "ninety billion, three hundred forty million, four hundred thirty-two thousand, one hundred thirty-eight".