349494434520 has 384 divisors, whose sum is σ = 1335414677760. Its totient is φ = 72356336640.

The previous prime is 349494434417. The next prime is 349494434539. The reversal of 349494434520 is 25434494943.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17906607 + ... + 17926113.

It is an arithmetic number, because the mean of its divisors is an integer number (3477642390).

Almost surely, 2^349494434520 is an apocalyptic number.

349494434520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 349494434520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667707338880).

349494434520 is an abundant number, since it is smaller than the sum of its proper divisors (985920243240).

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

349494434520 is a wasteful number, since it uses less digits than its factorization.

349494434520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19823 (or 19812 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 51.

The spelling of 349494434520 in words is "three hundred forty-nine billion, four hundred ninety-four million, four hundred thirty-four thousand, five hundred twenty".