344404138 has 16 divisors (see below), whose sum is σ = 556851456. Its totient is φ = 158811120.

The previous prime is 344404129. The next prime is 344404147. The reversal of 344404138 is 831404443.

344404138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (344404129) and next prime (344404147).

It is a super-2 number, since 2×344404138² = 237228420543046088, which contains 22 as substring.

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, 26383 + ... + 37213.

It is an arithmetic number, because the mean of its divisors is an integer number (34803216).

Almost surely, 2^344404138 is an apocalyptic number.

344404138 is a deficient number, since it is larger than the sum of its proper divisors (212447318).

344404138 is a wasteful number, since it uses less digits than its factorization.

344404138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12069.

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 344404138 is about 18558.1286233284. The cubic root of 344404138 is about 700.9538954472.

The spelling of 344404138 in words is "three hundred forty-four million, four hundred four thousand, one hundred thirty-eight".