349740890640 has 160 divisors (see below), whose sum is σ = 1257039901440. Its totient is φ = 89209257984.

The previous prime is 349740890633. The next prime is 349740890651. The reversal of 349740890640 is 46098047943.

It is a happy number.

349740890640 is a `hidden beast` number, since 3 + 4 + 97 + 408 + 90 + 64 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3470257 + ... + 3569616.

It is an arithmetic number, because the mean of its divisors is an integer number (7856499384).

Almost surely, 2^349740890640 is an apocalyptic number.

349740890640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

349740890640 is an abundant number, since it is smaller than the sum of its proper divisors (907299010800).

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

349740890640 is a wasteful number, since it uses less digits than its factorization.

349740890640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7039918 (or 7039906 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 349740890640 in words is "three hundred forty-nine billion, seven hundred forty million, eight hundred ninety thousand, six hundred forty".