398051 has 4 divisors (see below), whose sum is σ = 407352. Its totient is φ = 388752.

The previous prime is 398039. The next prime is 398053. The reversal of 398051 is 150893.

398051 = T₁₁₄ + T₁₁₅ + ... + T₁₅₆.

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

It is a cyclic number.

It is not a de Polignac number, because 398051 - 2¹⁰ = 397027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398051.

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, 4586 + ... + 4671.

It is an arithmetic number, because the mean of its divisors is an integer number (101838).

2³⁹⁸⁰⁵¹ is an apocalyptic number.

398051 is a deficient number, since it is larger than the sum of its proper divisors (9301).

398051 is an equidigital number, since it uses as much as digits as its factorization.

398051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9300.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 398051 is about 630.9128307461. The cubic root of 398051 is about 73.5607654584.

The spelling of 398051 in words is "three hundred ninety-eight thousand, fifty-one".