438877138 has 16 divisors (see below), whose sum is σ = 755083584. Its totient is φ = 187409520.

The previous prime is 438877133. The next prime is 438877177. The reversal of 438877138 is 831778834.

It is a super-2 number, since 2×438877138² = 385226284518142088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 438877091 and 438877100.

It is not an unprimeable number, because it can be changed into a prime (438877133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52708 + ... + 60463.

It is an arithmetic number, because the mean of its divisors is an integer number (47192724).

Almost surely, 2^438877138 is an apocalyptic number.

438877138 is a deficient number, since it is larger than the sum of its proper divisors (316206446).

438877138 is a wasteful number, since it uses less digits than its factorization.

438877138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113457.

The product of its digits is 903168, while the sum is 49.

The square root of 438877138 is about 20949.3946929261. The cubic root of 438877138 is about 759.9429423924.

The spelling of 438877138 in words is "four hundred thirty-eight million, eight hundred seventy-seven thousand, one hundred thirty-eight".