349391478440 has 64 divisors (see below), whose sum is σ = 795984019200. Its totient is φ = 138013166848.

The previous prime is 349391478437. The next prime is 349391478511. The reversal of 349391478440 is 44874193943.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1228001 + ... + 1485519.

It is an arithmetic number, because the mean of its divisors is an integer number (12437250300).

Almost surely, 2^349391478440 is an apocalyptic number.

It is an amenable number.

349391478440 is an abundant number, since it is smaller than the sum of its proper divisors (446592540760).

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

349391478440 is a wasteful number, since it uses less digits than its factorization.

349391478440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257954 (or 257950 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 56.

The spelling of 349391478440 in words is "three hundred forty-nine billion, three hundred ninety-one million, four hundred seventy-eight thousand, four hundred forty".