398242684 has 24 divisors (see below), whose sum is σ = 809988480. Its totient is φ = 167781936.

The previous prime is 398242661. The next prime is 398242759. The reversal of 398242684 is 486242893.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118882 + ... + 122185.

It is an arithmetic number, because the mean of its divisors is an integer number (33749520).

Almost surely, 2^398242684 is an apocalyptic number.

It is an amenable number.

398242684 is an abundant number, since it is smaller than the sum of its proper divisors (411745796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398242684 is a wasteful number, since it uses less digits than its factorization.

398242684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241137 (or 241135 counting only the distinct ones).

The product of its digits is 663552, while the sum is 46.

The square root of 398242684 is about 19956.0187412219. The cubic root of 398242684 is about 735.7257144888.

The spelling of 398242684 in words is "three hundred ninety-eight million, two hundred forty-two thousand, six hundred eighty-four".