398872 has 16 divisors (see below), whose sum is σ = 759240. Its totient is φ = 196416.

The previous prime is 398863. The next prime is 398887. The reversal of 398872 is 278893.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243 + ... + 925.

2³⁹⁸⁸⁷² is an apocalyptic number.

It is an amenable number.

398872 is a deficient number, since it is larger than the sum of its proper divisors (360368).

398872 is a wasteful number, since it uses less digits than its factorization.

398872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762 (or 758 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 398872 is about 631.5631401531. The cubic root of 398872 is about 73.6113049742.

It can be divided in two parts, 39 and 8872, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 398872 in words is "three hundred ninety-eight thousand, eight hundred seventy-two".