398057 has 4 divisors (see below), whose sum is σ = 434256. Its totient is φ = 361860.

The previous prime is 398053. The next prime is 398059. The reversal of 398057 is 750893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 398057 - 2² = 398053 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398057.

It is not an unprimeable number, because it can be changed into a prime (398053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18083 + ... + 18104.

It is an arithmetic number, because the mean of its divisors is an integer number (108564).

2³⁹⁸⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

398057 is a deficient number, since it is larger than the sum of its proper divisors (36199).

398057 is a wasteful number, since it uses less digits than its factorization.

398057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36198.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 398057 is about 630.9175857432. The cubic root of 398057 is about 73.5611350612.

Subtracting 398057 from its reverse (750893), we obtain a square (352836 = 594²).

The spelling of 398057 in words is "three hundred ninety-eight thousand, fifty-seven".