398756 has 6 divisors (see below), whose sum is σ = 697830. Its totient is φ = 199376.

The previous prime is 398731. The next prime is 398759. The reversal of 398756 is 657893.

It can be written as a sum of positive squares in only one way, i.e., 320356 + 78400 = 566^2 + 280^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49841 + ... + 49848.

It is an arithmetic number, because the mean of its divisors is an integer number (116305).

2³⁹⁸⁷⁵⁶ is an apocalyptic number.

It is an amenable number.

398756 is a deficient number, since it is larger than the sum of its proper divisors (299074).

398756 is a wasteful number, since it uses less digits than its factorization.

398756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99693 (or 99691 counting only the distinct ones).

The product of its digits is 45360, while the sum is 38.

The square root of 398756 is about 631.4712978434. The cubic root of 398756 is about 73.6041683997.

The spelling of 398756 in words is "three hundred ninety-eight thousand, seven hundred fifty-six".