391438032966 has 24 divisors (see below), whose sum is σ = 848210188800. Its totient is φ = 130464813456.

The previous prime is 391438032959. The next prime is 391438033001. The reversal of 391438032966 is 669230834193.

391438032966 is a `hidden beast` number, since 3 + 91 + 438 + 0 + 32 + 96 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1044166 + ... + 1368633.

It is an arithmetic number, because the mean of its divisors is an integer number (35342091200).

Almost surely, 2^391438032966 is an apocalyptic number.

391438032966 is an abundant number, since it is smaller than the sum of its proper divisors (456772155834).

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

391438032966 is a wasteful number, since it uses less digits than its factorization.

391438032966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421820 (or 2421817 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 54.

The spelling of 391438032966 in words is "three hundred ninety-one billion, four hundred thirty-eight million, thirty-two thousand, nine hundred sixty-six".