398670 has 32 divisors (see below), whose sum is σ = 973728. Its totient is φ = 104448.

The previous prime is 398669. The next prime is 398681. The reversal of 398670 is 76893.

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 15 ways as a sum of consecutive naturals, for example, 2842 + ... + 2978.

It is an arithmetic number, because the mean of its divisors is an integer number (30429).

2³⁹⁸⁶⁷⁰ is an apocalyptic number.

398670 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

398670 is an abundant number, since it is smaller than the sum of its proper divisors (575058).

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

398670 is a wasteful number, since it uses less digits than its factorization.

398670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 398670 is about 631.4031992317. The cubic root of 398670 is about 73.5988765975.

The spelling of 398670 in words is "three hundred ninety-eight thousand, six hundred seventy".