349943820 has 24 divisors (see below), whose sum is σ = 979842864. Its totient is φ = 93318336.

The previous prime is 349943807. The next prime is 349943849. The reversal of 349943820 is 28349943.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2916139 + ... + 2916258.

It is an arithmetic number, because the mean of its divisors is an integer number (40826786).

Almost surely, 2^349943820 is an apocalyptic number.

349943820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

349943820 is an abundant number, since it is smaller than the sum of its proper divisors (629899044).

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

349943820 is a wasteful number, since it uses less digits than its factorization.

349943820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5832409 (or 5832407 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 349943820 is about 18706.7853999558. The cubic root of 349943820 is about 704.6921647848.

The spelling of 349943820 in words is "three hundred forty-nine million, nine hundred forty-three thousand, eight hundred twenty".