398542 has 8 divisors (see below), whose sum is σ = 604800. Its totient is φ = 196944.

The previous prime is 398539. The next prime is 398543. The reversal of 398542 is 245893.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398543) 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, 942 + ... + 1297.

It is an arithmetic number, because the mean of its divisors is an integer number (75600).

2³⁹⁸⁵⁴² is an apocalyptic number.

398542 is a deficient number, since it is larger than the sum of its proper divisors (206258).

398542 is a wasteful number, since it uses less digits than its factorization.

398542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330.

The product of its digits is 8640, while the sum is 31.

The square root of 398542 is about 631.3018295554. The cubic root of 398542 is about 73.5909990174.

The spelling of 398542 in words is "three hundred ninety-eight thousand, five hundred forty-two".