349353940 has 24 divisors (see below), whose sum is σ = 790077960. Its totient is φ = 128992128.

The previous prime is 349353937. The next prime is 349353941. The reversal of 349353940 is 49353943.

It can be written as a sum of positive squares in 4 ways, for example, as 15634116 + 333719824 = 3954^2 + 18268^2 .

It is a junction number, because it is equal to n+sod(n) for n = 349353893 and 349353902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349353941) 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, 671575 + ... + 672094.

It is an arithmetic number, because the mean of its divisors is an integer number (32919915).

Almost surely, 2^349353940 is an apocalyptic number.

It is an amenable number.

349353940 is an abundant number, since it is smaller than the sum of its proper divisors (440724020).

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

349353940 is a wasteful number, since it uses less digits than its factorization.

349353940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343691 (or 1343689 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 40.

The square root of 349353940 is about 18691.0122786327. The cubic root of 349353940 is about 704.2959891950.

The spelling of 349353940 in words is "three hundred forty-nine million, three hundred fifty-three thousand, nine hundred forty".