343396421940 has 192 divisors, whose sum is σ = 1148126015232. Its totient is φ = 75584102400.

The previous prime is 343396421917. The next prime is 343396421983. The reversal of 343396421940 is 49124693343.

It is a super-2 number, since 2×343396421940² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 343396421940.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 195324 + ... + 851436.

It is an arithmetic number, because the mean of its divisors is an integer number (5979822996).

Almost surely, 2^343396421940 is an apocalyptic number.

343396421940 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 343396421940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (574063007616).

343396421940 is an abundant number, since it is smaller than the sum of its proper divisors (804729593292).

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

343396421940 is a wasteful number, since it uses less digits than its factorization.

343396421940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656210 (or 656208 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 48.

The spelling of 343396421940 in words is "three hundred forty-three billion, three hundred ninety-six million, four hundred twenty-one thousand, nine hundred forty".