344430840 has 64 divisors (see below), whose sum is σ = 1112781600. Its totient is φ = 84782592.

The previous prime is 344430809. The next prime is 344430887. The reversal of 344430840 is 48034443.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 344430798 and 344430807.

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, 108835 + ... + 111954.

Almost surely, 2^344430840 is an apocalyptic number.

344430840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

344430840 is an abundant number, since it is smaller than the sum of its proper divisors (768350760).

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

344430840 is a wasteful number, since it uses less digits than its factorization.

344430840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220816 (or 220812 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 344430840 is about 18558.8480245946. The cubic root of 344430840 is about 700.9720101997.

The spelling of 344430840 in words is "three hundred forty-four million, four hundred thirty thousand, eight hundred forty".