398942 has 8 divisors (see below), whose sum is σ = 602832. Its totient is φ = 198000.

The previous prime is 398941. The next prime is 398969. The reversal of 398942 is 249893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359 + ... + 962.

It is an arithmetic number, because the mean of its divisors is an integer number (75354).

2³⁹⁸⁹⁴² is an apocalyptic number.

398942 is a deficient number, since it is larger than the sum of its proper divisors (203890).

398942 is a wasteful number, since it uses less digits than its factorization.

398942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474.

The product of its digits is 15552, while the sum is 35.

The square root of 398942 is about 631.6185557756. The cubic root of 398942 is about 73.6156108585.

Multiplying 398942 by its sum of digits (35), we get a triangular number (13962970 = T₅₂₈₄).

The spelling of 398942 in words is "three hundred ninety-eight thousand, nine hundred forty-two".