398985696 has 96 divisors (see below), whose sum is σ = 1185801120. Its totient is φ = 130470912.

The previous prime is 398985673. The next prime is 398985701. The reversal of 398985696 is 696589893.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×398985696² = 318379171225208832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41436 + ... + 50148.

It is an arithmetic number, because the mean of its divisors is an integer number (12352095).

Almost surely, 2^398985696 is an apocalyptic number.

398985696 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398985696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592900560).

398985696 is an abundant number, since it is smaller than the sum of its proper divisors (786815424).

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

398985696 is a wasteful number, since it uses less digits than its factorization.

398985696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8785 (or 8771 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 63.

The square root of 398985696 is about 19974.6263043893. The cubic root of 398985696 is about 736.1829845908.

The spelling of 398985696 in words is "three hundred ninety-eight million, nine hundred eighty-five thousand, six hundred ninety-six".