398362031 has 4 divisors (see below), whose sum is σ = 398417232. Its totient is φ = 398306832.

The previous prime is 398362007. The next prime is 398362033. The reversal of 398362031 is 130263893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398362031 is a prime.

It is a super-2 number, since 2×398362031² = 317384615484889922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398361982 and 398362000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398362033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14795 + ... + 31868.

It is an arithmetic number, because the mean of its divisors is an integer number (99604308).

Almost surely, 2^398362031 is an apocalyptic number.

398362031 is a deficient number, since it is larger than the sum of its proper divisors (55201).

398362031 is an equidigital number, since it uses as much as digits as its factorization.

398362031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55200.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 398362031 is about 19959.0087679724. The cubic root of 398362031 is about 735.7992022476.

The spelling of 398362031 in words is "three hundred ninety-eight million, three hundred sixty-two thousand, thirty-one".