349998138 has 32 divisors (see below), whose sum is σ = 888885120. Its totient is φ = 99999360.

The previous prime is 349998119. The next prime is 349998197. The reversal of 349998138 is 831899943.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon 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, 462583 + ... + 463338.

It is an arithmetic number, because the mean of its divisors is an integer number (27777660).

Almost surely, 2^349998138 is an apocalyptic number.

349998138 is an abundant number, since it is smaller than the sum of its proper divisors (538886982).

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

349998138 is a wasteful number, since it uses less digits than its factorization.

349998138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925939 (or 925933 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 349998138 is about 18708.2371697603. The cubic root of 349998138 is about 704.7286234833.

The spelling of 349998138 in words is "three hundred forty-nine million, nine hundred ninety-eight thousand, one hundred thirty-eight".