349872271638 has 32 divisors (see below), whose sum is σ = 701331436800. Its totient is φ = 116359719840.

The previous prime is 349872271627. The next prime is 349872271667. The reversal of 349872271638 is 836172278943.

It is a happy number.

It is a super-2 number, since 2×349872271638² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15894456 + ... + 15916452.

It is an arithmetic number, because the mean of its divisors is an integer number (21916607400).

Almost surely, 2^349872271638 is an apocalyptic number.

349872271638 is an abundant number, since it is smaller than the sum of its proper divisors (351459165162).

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

349872271638 is a wasteful number, since it uses less digits than its factorization.

349872271638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27892.

The product of its digits is 24385536, while the sum is 60.

The spelling of 349872271638 in words is "three hundred forty-nine billion, eight hundred seventy-two million, two hundred seventy-one thousand, six hundred thirty-eight".