399250428663 has 8 divisors (see below), whose sum is σ = 532422932976. Its totient is φ = 266122438400.

The previous prime is 399250428659. The next prime is 399250428667. The reversal of 399250428663 is 366824052993.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (399250428659) and next prime (399250428667).

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 399250428663 - 2² = 399250428659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399250428667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11107578 + ... + 11143463.

It is an arithmetic number, because the mean of its divisors is an integer number (66552866622).

Almost surely, 2^399250428663 is an apocalyptic number.

399250428663 is a deficient number, since it is larger than the sum of its proper divisors (133172504313).

399250428663 is a wasteful number, since it uses less digits than its factorization.

399250428663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22257025.

The product of its (nonzero) digits is 16796160, while the sum is 57.

The spelling of 399250428663 in words is "three hundred ninety-nine billion, two hundred fifty million, four hundred twenty-eight thousand, six hundred sixty-three".