396961688 has 8 divisors (see below), whose sum is σ = 744303180. Its totient is φ = 198480840.

The previous prime is 396961687. The next prime is 396961703. The reversal of 396961688 is 886169693.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396961687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24810098 + ... + 24810113.

Almost surely, 2^396961688 is an apocalyptic number.

It is an amenable number.

396961688 is a deficient number, since it is larger than the sum of its proper divisors (347341492).

396961688 is a wasteful number, since it uses less digits than its factorization.

396961688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49620217 (or 49620213 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 56.

The square root of 396961688 is about 19923.8974098945. The cubic root of 396961688 is about 734.9360167667.

The spelling of 396961688 in words is "three hundred ninety-six million, nine hundred sixty-one thousand, six hundred eighty-eight".