398970 has 96 divisors (see below), whose sum is σ = 1257984. Its totient is φ = 86400.

The previous prime is 398969. The next prime is 398977. The reversal of 398970 is 79893.

It is not an unprimeable number, because it can be changed into a prime (398977) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12855 + ... + 12885.

It is an arithmetic number, because the mean of its divisors is an integer number (13104).

2³⁹⁸⁹⁷⁰ is an apocalyptic number.

398970 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 398970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628992).

398970 is an abundant number, since it is smaller than the sum of its proper divisors (859014).

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

398970 is a wasteful number, since it uses less digits than its factorization.

398970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 398970 is about 631.6407206633. The cubic root of 398970 is about 73.6173330711.

It can be divided in two parts, 39 and 8970, that added together give a palindrome (9009).

The spelling of 398970 in words is "three hundred ninety-eight thousand, nine hundred seventy".