398919976 has 128 divisors (see below), whose sum is σ = 961632000. Its totient is φ = 154103040.

The previous prime is 398919971. The next prime is 398920001. The reversal of 398919976 is 679919893.

It is not an unprimeable number, because it can be changed into a prime (398919971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1890511 + ... + 1890721.

It is an arithmetic number, because the mean of its divisors is an integer number (7512750).

Almost surely, 2^398919976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398919976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (480816000).

398919976 is an abundant number, since it is smaller than the sum of its proper divisors (562712024).

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

398919976 is a wasteful number, since it uses less digits than its factorization.

398919976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 286 counting only the distinct ones).

The product of its digits is 6613488, while the sum is 61.

The square root of 398919976 is about 19972.9811495430. The cubic root of 398919976 is about 736.1425615857.

The spelling of 398919976 in words is "three hundred ninety-eight million, nine hundred nineteen thousand, nine hundred seventy-six".