343505940 has 72 divisors (see below), whose sum is σ = 1015166880. Its totient is φ = 86774976.

The previous prime is 343505933. The next prime is 343505951. The reversal of 343505940 is 49505343.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13731 + ... + 29589.

It is an arithmetic number, because the mean of its divisors is an integer number (14099540).

Almost surely, 2^343505940 is an apocalyptic number.

343505940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 343505940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (507583440).

343505940 is an abundant number, since it is smaller than the sum of its proper divisors (671660940).

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

343505940 is a wasteful number, since it uses less digits than its factorization.

343505940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15909 (or 15888 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 343505940 is about 18533.9132403279. The cubic root of 343505940 is about 700.3440077840.

The spelling of 343505940 in words is "three hundred forty-three million, five hundred five thousand, nine hundred forty".