398840852 has 24 divisors (see below), whose sum is σ = 705073152. Its totient is φ = 197402400.

The previous prime is 398840821. The next prime is 398840887. The reversal of 398840852 is 258048893.

It is a junction number, because it is equal to n+sod(n) for n = 398840797 and 398840806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169202 + ... + 171542.

It is an arithmetic number, because the mean of its divisors is an integer number (29378048).

Almost surely, 2^398840852 is an apocalyptic number.

It is an amenable number.

398840852 is a deficient number, since it is larger than the sum of its proper divisors (306232300).

398840852 is a wasteful number, since it uses less digits than its factorization.

398840852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759 (or 2757 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 47.

The square root of 398840852 is about 19971.0002753993. Note that the first 3 decimals coincide. The cubic root of 398840852 is about 736.0938881683.

The spelling of 398840852 in words is "three hundred ninety-eight million, eight hundred forty thousand, eight hundred fifty-two".