398862529 has 8 divisors (see below), whose sum is σ = 430345832. Its totient is φ = 367493760.

The previous prime is 398862521. The next prime is 398862533. The reversal of 398862529 is 925268893.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20948929 + 377913600 = 4577^2 + 19440^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398862529 - 2³ = 398862521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398862521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21324 + ... + 35389.

It is an arithmetic number, because the mean of its divisors is an integer number (53793229).

Almost surely, 2^398862529 is an apocalyptic number.

It is an amenable number.

398862529 is a deficient number, since it is larger than the sum of its proper divisors (31483303).

398862529 is a wasteful number, since it uses less digits than its factorization.

398862529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57267.

The product of its digits is 1866240, while the sum is 52.

The square root of 398862529 is about 19971.5429799502. The cubic root of 398862529 is about 736.1072234942.

The spelling of 398862529 in words is "three hundred ninety-eight million, eight hundred sixty-two thousand, five hundred twenty-nine".