398709100 has 36 divisors (see below), whose sum is σ = 871038000. Its totient is φ = 158407360.

The previous prime is 398709083. The next prime is 398709119. The reversal of 398709100 is 1907893.

It is a self number, because there is not a number n which added to its sum of digits gives 398709100.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1521 + ... + 28279.

It is an arithmetic number, because the mean of its divisors is an integer number (24195500).

Almost surely, 2^398709100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398709100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (435519000).

398709100 is an abundant number, since it is smaller than the sum of its proper divisors (472328900).

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

398709100 is a wasteful number, since it uses less digits than its factorization.

398709100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26922 (or 26915 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 398709100 is about 19967.7014200433. The cubic root of 398709100 is about 736.0128261588.

The spelling of 398709100 in words is "three hundred ninety-eight million, seven hundred nine thousand, one hundred".