343181640 has 32 divisors (see below), whose sum is σ = 1029545280. Its totient is φ = 91515072.

The previous prime is 343181633. The next prime is 343181659. The reversal of 343181640 is 46181343.

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 = 343181598 and 343181607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1429804 + ... + 1430043.

It is an arithmetic number, because the mean of its divisors is an integer number (32173290).

Almost surely, 2^343181640 is an apocalyptic number.

343181640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

343181640 is an abundant number, since it is smaller than the sum of its proper divisors (686363640).

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

343181640 is a wasteful number, since it uses less digits than its factorization.

343181640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2859861 (or 2859857 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 343181640 is about 18525.1623474668. The cubic root of 343181640 is about 700.1235428205.

The spelling of 343181640 in words is "three hundred forty-three million, one hundred eighty-one thousand, six hundred forty".