398457 has 6 divisors (see below), whose sum is σ = 575562. Its totient is φ = 265632.

The previous prime is 398441. The next prime is 398459. The reversal of 398457 is 754893.

It can be written as a sum of positive squares in only one way, i.e., 251001 + 147456 = 501^2 + 384^2 .

It is not a de Polignac number, because 398457 - 2⁴ = 398441 is a prime.

It is a nialpdrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398457.

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 in 5 ways as a sum of consecutive naturals, for example, 22128 + ... + 22145.

It is an arithmetic number, because the mean of its divisors is an integer number (95927).

2³⁹⁸⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

398457 is a deficient number, since it is larger than the sum of its proper divisors (177105).

398457 is a wasteful number, since it uses less digits than its factorization.

398457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44279 (or 44276 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 398457 is about 631.2345047603. The cubic root of 398457 is about 73.5857668799.

The spelling of 398457 in words is "three hundred ninety-eight thousand, four hundred fifty-seven".