398635963 has 8 divisors (see below), whose sum is σ = 436448880. Its totient is φ = 361085280.

The previous prime is 398635957. The next prime is 398635973. The reversal of 398635963 is 369536893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398635963 - 2⁹ = 398635451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398635963.

It is not an unprimeable number, because it can be changed into a prime (398635933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62368 + ... + 68461.

It is an arithmetic number, because the mean of its divisors is an integer number (54556110).

Almost surely, 2^398635963 is an apocalyptic number.

398635963 is a deficient number, since it is larger than the sum of its proper divisors (37812917).

398635963 is a wasteful number, since it uses less digits than its factorization.

398635963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131117.

The product of its digits is 3149280, while the sum is 52.

The square root of 398635963 is about 19965.8699534981. The cubic root of 398635963 is about 735.9678200279.

The spelling of 398635963 in words is "three hundred ninety-eight million, six hundred thirty-five thousand, nine hundred sixty-three".