438117438 has 32 divisors (see below), whose sum is σ = 1012124160. Its totient is φ = 124952960.

The previous prime is 438117437. The next prime is 438117443. The reversal of 438117438 is 834711834.

It is a junction number, because it is equal to n+sod(n) for n = 438117396 and 438117405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438117437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194118 + ... + 196361.

It is an arithmetic number, because the mean of its divisors is an integer number (31628880).

Almost surely, 2^438117438 is an apocalyptic number.

438117438 is an abundant number, since it is smaller than the sum of its proper divisors (574006722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

438117438 is a wasteful number, since it uses less digits than its factorization.

438117438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390512.

The product of its digits is 64512, while the sum is 39.

The square root of 438117438 is about 20931.2550507608. The cubic root of 438117438 is about 759.5041999409.

The spelling of 438117438 in words is "four hundred thirty-eight million, one hundred seventeen thousand, four hundred thirty-eight".