215198688 has 48 divisors (see below), whose sum is σ = 568995840. Its totient is φ = 71212416.

The previous prime is 215198677. The next prime is 215198701. The reversal of 215198688 is 886891512.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 5281 + ... + 21407.

It is an arithmetic number, because the mean of its divisors is an integer number (11854080).

Almost surely, 2^215198688 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 215198688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284497920).

215198688 is an abundant number, since it is smaller than the sum of its proper divisors (353797152).

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

215198688 is a wasteful number, since it uses less digits than its factorization.

215198688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16279 (or 16271 counting only the distinct ones).

The product of its digits is 276480, while the sum is 48.

The square root of 215198688 is about 14669.6519386112. The cubic root of 215198688 is about 599.2571250521.

The spelling of 215198688 in words is "two hundred fifteen million, one hundred ninety-eight thousand, six hundred eighty-eight".