398031 has 8 divisors (see below), whose sum is σ = 558720. Its totient is φ = 251352.

The previous prime is 398029. The next prime is 398033. The reversal of 398031 is 130893.

It is an interprime number because it is at equal distance from previous prime (398029) and next prime (398033).

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

It is not a de Polignac number, because 398031 - 2¹ = 398029 is a prime.

It is a super-2 number, since 2×398031² = 316857353922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 397992 and 398010.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398031.

It is not an unprimeable number, because it can be changed into a prime (398033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3435 + ... + 3548.

It is an arithmetic number, because the mean of its divisors is an integer number (69840).

2³⁹⁸⁰³¹ is an apocalyptic number.

398031 is a deficient number, since it is larger than the sum of its proper divisors (160689).

398031 is a wasteful number, since it uses less digits than its factorization.

398031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7005.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 398031 is about 630.8969804968. The cubic root of 398031 is about 73.5595334220.

The spelling of 398031 in words is "three hundred ninety-eight thousand, thirty-one".