390709646768 has 20 divisors (see below), whose sum is σ = 865142789520. Its totient is φ = 167446991424.

The previous prime is 390709646711. The next prime is 390709646801. The reversal of 390709646768 is 867646907093.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1744239383 + ... + 1744239606.

It is an arithmetic number, because the mean of its divisors is an integer number (43257139476).

Almost surely, 2^390709646768 is an apocalyptic number.

It is an amenable number.

390709646768 is an abundant number, since it is smaller than the sum of its proper divisors (474433142752).

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

390709646768 is a wasteful number, since it uses less digits than its factorization.

390709646768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3488479004 (or 3488478998 counting only the distinct ones).

The product of its (nonzero) digits is 82301184, while the sum is 65.

The spelling of 390709646768 in words is "three hundred ninety billion, seven hundred nine million, six hundred forty-six thousand, seven hundred sixty-eight".