391966948 has 12 divisors (see below), whose sum is σ = 686081340. Its totient is φ = 195943712.

The previous prime is 391966921. The next prime is 391966957. The reversal of 391966948 is 849669193.

It can be written as a sum of positive squares in 2 ways, for example, as 334085284 + 57881664 = 18278^2 + 7608^2 .

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, 30690 + ... + 41542.

It is an arithmetic number, because the mean of its divisors is an integer number (57173445).

Almost surely, 2^391966948 is an apocalyptic number.

It is an amenable number.

391966948 is a deficient number, since it is larger than the sum of its proper divisors (294114392).

391966948 is a wasteful number, since it uses less digits than its factorization.

391966948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19886 (or 19884 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 55.

The square root of 391966948 is about 19798.1551665805. The cubic root of 391966948 is about 731.8405721455.

The spelling of 391966948 in words is "three hundred ninety-one million, nine hundred sixty-six thousand, nine hundred forty-eight".