398639648 has 24 divisors (see below), whose sum is σ = 856170000. Its totient is φ = 181199680.

The previous prime is 398639599. The next prime is 398639651. The reversal of 398639648 is 846936893.

It is a junction number, because it is equal to n+sod(n) for n = 398639593 and 398639602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565898 + ... + 566601.

It is an arithmetic number, because the mean of its divisors is an integer number (35673750).

Almost surely, 2^398639648 is an apocalyptic number.

It is an amenable number.

398639648 is an abundant number, since it is smaller than the sum of its proper divisors (457530352).

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

398639648 is a wasteful number, since it uses less digits than its factorization.

398639648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132520 (or 1132512 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 56.

The square root of 398639648 is about 19965.9622357651. The cubic root of 398639648 is about 735.9700877887.

It can be divided in two parts, 3986 and 39648, that added together give a palindrome (43634).

The spelling of 398639648 in words is "three hundred ninety-eight million, six hundred thirty-nine thousand, six hundred forty-eight".