393840394234 has 96 divisors (see below), whose sum is σ = 719487014400. Its totient is φ = 161081706240.

The previous prime is 393840394231. The next prime is 393840394237. The reversal of 393840394234 is 432493048393.

It is an interprime number because it is at equal distance from previous prime (393840394231) and next prime (393840394237).

It is a super-2 number, since 2×393840394234² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (393840394231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34593307 + ... + 34604689.

It is an arithmetic number, because the mean of its divisors is an integer number (7494656400).

Almost surely, 2^393840394234 is an apocalyptic number.

393840394234 is a deficient number, since it is larger than the sum of its proper divisors (325646620166).

393840394234 is a wasteful number, since it uses less digits than its factorization.

393840394234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11628 (or 11621 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 52.

The spelling of 393840394234 in words is "three hundred ninety-three billion, eight hundred forty million, three hundred ninety-four thousand, two hundred thirty-four".