398566844 has 24 divisors (see below), whose sum is σ = 751934400. Its totient is φ = 183760704.

The previous prime is 398566841. The next prime is 398566859. The reversal of 398566844 is 448665893.

It is a super-2 number, since 2×398566844² = 317711058272240672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398566841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53882 + ... + 60830.

It is an arithmetic number, because the mean of its divisors is an integer number (31330600).

Almost surely, 2^398566844 is an apocalyptic number.

It is an amenable number.

398566844 is a deficient number, since it is larger than the sum of its proper divisors (353367556).

398566844 is a wasteful number, since it uses less digits than its factorization.

398566844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8069 (or 8067 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 53.

The square root of 398566844 is about 19964.1389496267. The cubic root of 398566844 is about 735.9252813838.

The spelling of 398566844 in words is "three hundred ninety-eight million, five hundred sixty-six thousand, eight hundred forty-four".