349204540 has 24 divisors (see below), whose sum is σ = 734791680. Its totient is φ = 139403328.

The previous prime is 349204523. The next prime is 349204543. The reversal of 349204540 is 45402943.

It is a happy number.

It is a super-2 number, since 2×349204540² = 243887621513223200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349204543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6972 + ... + 27331.

It is an arithmetic number, because the mean of its divisors is an integer number (30616320).

Almost surely, 2^349204540 is an apocalyptic number.

It is an amenable number.

349204540 is an abundant number, since it is smaller than the sum of its proper divisors (385587140).

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

349204540 is a wasteful number, since it uses less digits than its factorization.

349204540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34821 (or 34819 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 349204540 is about 18687.0152779945. The cubic root of 349204540 is about 704.1955783017.

The spelling of 349204540 in words is "three hundred forty-nine million, two hundred four thousand, five hundred forty".