349412140 has 72 divisors (see below), whose sum is σ = 931189392. Its totient is φ = 108904320.

The previous prime is 349412137. The next prime is 349412183. The reversal of 349412140 is 41214943.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 349412099 and 349412108.

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, 5427 + ... + 26986.

It is an arithmetic number, because the mean of its divisors is an integer number (12933186).

Almost surely, 2^349412140 is an apocalyptic number.

It is an amenable number.

349412140 is an abundant number, since it is smaller than the sum of its proper divisors (581777252).

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

349412140 is a wasteful number, since it uses less digits than its factorization.

349412140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32447 (or 32438 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 349412140 is about 18692.5691118155. The cubic root of 349412140 is about 704.3350973371.

The spelling of 349412140 in words is "three hundred forty-nine million, four hundred twelve thousand, one hundred forty".