398824287 has 16 divisors (see below), whose sum is σ = 535432800. Its totient is φ = 264056832.

The previous prime is 398824249. The next prime is 398824313. The reversal of 398824287 is 782428893.

It is not a de Polignac number, because 398824287 - 2⁷ = 398824159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398824487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327103 + ... + 328319.

It is an arithmetic number, because the mean of its divisors is an integer number (33464550).

Almost surely, 2^398824287 is an apocalyptic number.

398824287 is a deficient number, since it is larger than the sum of its proper divisors (136608513).

398824287 is a wasteful number, since it uses less digits than its factorization.

398824287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882.

The product of its digits is 1548288, while the sum is 51.

The square root of 398824287 is about 19970.5855447456. The cubic root of 398824287 is about 736.0836973332.

The spelling of 398824287 in words is "three hundred ninety-eight million, eight hundred twenty-four thousand, two hundred eighty-seven".