344324640 has 96 divisors (see below), whose sum is σ = 1183242816. Its totient is φ = 83471360.

The previous prime is 344324639. The next prime is 344324641. The reversal of 344324640 is 46423443.

It is an interprime number because it is at equal distance from previous prime (344324639) and next prime (344324641).

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×344324640² = 237118915422259200, which contains 22 as substring.

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 = 344324598 and 344324607.

It is not an unprimeable number, because it can be changed into a prime (344324641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27327 + ... + 37886.

It is an arithmetic number, because the mean of its divisors is an integer number (12325446).

Almost surely, 2^344324640 is an apocalyptic number.

344324640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

344324640 is an abundant number, since it is smaller than the sum of its proper divisors (838918176).

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

344324640 is a wasteful number, since it uses less digits than its factorization.

344324640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65242 (or 65234 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

The square root of 344324640 is about 18555.9866350458. The cubic root of 344324640 is about 700.8999581153.

The spelling of 344324640 in words is "three hundred forty-four million, three hundred twenty-four thousand, six hundred forty".