344400644 has 24 divisors (see below), whose sum is σ = 689720640. Its totient is φ = 147403296.

The previous prime is 344400577. The next prime is 344400647. The reversal of 344400644 is 446004443.

It is a super-2 number, since 2×344400644² = 237223607175229472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (344400647) 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, 14222 + ... + 29850.

It is an arithmetic number, because the mean of its divisors is an integer number (28738360).

Almost surely, 2^344400644 is an apocalyptic number.

It is an amenable number.

344400644 is an abundant number, since it is smaller than the sum of its proper divisors (345319996).

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

344400644 is a wasteful number, since it uses less digits than its factorization.

344400644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16427 (or 16425 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

The square root of 344400644 is about 18558.0344864428. The cubic root of 344400644 is about 700.9515250331.

The spelling of 344400644 in words is "three hundred forty-four million, four hundred thousand, six hundred forty-four".