398830237 has 16 divisors (see below), whose sum is σ = 436590000. Its totient is φ = 362133504.

The previous prime is 398830231. The next prime is 398830253. The reversal of 398830237 is 732038893.

It can be written as a sum of positive squares in 8 ways, for example, as 39765636 + 359064601 = 6306^2 + 18949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398830237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398830193 and 398830202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398830231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210189 + ... + 212077.

It is an arithmetic number, because the mean of its divisors is an integer number (27286875).

Almost surely, 2^398830237 is an apocalyptic number.

It is an amenable number.

398830237 is a deficient number, since it is larger than the sum of its proper divisors (37759763).

398830237 is a wasteful number, since it uses less digits than its factorization.

398830237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 398830237 is about 19970.7345132822. The cubic root of 398830237 is about 736.0873578226.

It can be divided in two parts, 3988 and 30237, that added together give a square (34225 = 185²).

The spelling of 398830237 in words is "three hundred ninety-eight million, eight hundred thirty thousand, two hundred thirty-seven".