398456 has 8 divisors (see below), whose sum is σ = 747120. Its totient is φ = 199224.

The previous prime is 398441. The next prime is 398459. The reversal of 398456 is 654893.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24896 + ... + 24911.

It is an arithmetic number, because the mean of its divisors is an integer number (93390).

2³⁹⁸⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

398456 is a deficient number, since it is larger than the sum of its proper divisors (348664).

398456 is a wasteful number, since it uses less digits than its factorization.

398456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49813 (or 49809 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 398456 is about 631.2337126612. The cubic root of 398456 is about 73.5857053209.

The spelling of 398456 in words is "three hundred ninety-eight thousand, four hundred fifty-six".