398660976 has 120 divisors (see below), whose sum is σ = 1279141344. Its totient is φ = 113541120.

The previous prime is 398660963. The next prime is 398660981. The reversal of 398660976 is 679066893.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 621616 + ... + 622256.

Almost surely, 2^398660976 is an apocalyptic number.

398660976 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398660976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (639570672).

398660976 is an abundant number, since it is smaller than the sum of its proper divisors (880480368).

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

398660976 is a wasteful number, since it uses less digits than its factorization.

398660976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279 (or 1270 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The square root of 398660976 is about 19966.4963376152. The cubic root of 398660976 is about 735.9832128339.

The spelling of 398660976 in words is "three hundred ninety-eight million, six hundred sixty thousand, nine hundred seventy-six".