399825846 has 48 divisors (see below), whose sum is σ = 992662944. Its totient is φ = 113933952.

The previous prime is 399825841. The next prime is 399825847. The reversal of 399825846 is 648528993.

It is a junction number, because it is equal to n+sod(n) for n = 399825792 and 399825801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399825841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46026 + ... + 54018.

It is an arithmetic number, because the mean of its divisors is an integer number (20680478).

Almost surely, 2^399825846 is an apocalyptic number.

399825846 is an abundant number, since it is smaller than the sum of its proper divisors (592837098).

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

399825846 is a wasteful number, since it uses less digits than its factorization.

399825846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8405 (or 8402 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 399825846 is about 19995.6456759966. The cubic root of 399825846 is about 736.6993527353.

The spelling of 399825846 in words is "three hundred ninety-nine million, eight hundred twenty-five thousand, eight hundred forty-six".