215368944 has 80 divisors (see below), whose sum is σ = 639244800. Its totient is φ = 61205760.

The previous prime is 215368913. The next prime is 215368957. The reversal of 215368944 is 449863512.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 215368896 and 215368905.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65254 + ... + 68474.

It is an arithmetic number, because the mean of its divisors is an integer number (7990560).

Almost surely, 2^215368944 is an apocalyptic number.

215368944 is a gapful number since it is divisible by the number (24) 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 215368944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319622400).

215368944 is an abundant number, since it is smaller than the sum of its proper divisors (423875856).

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

215368944 is a wasteful number, since it uses less digits than its factorization.

215368944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438 (or 3432 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 215368944 is about 14675.4537919616. The cubic root of 215368944 is about 599.4151189310.

The spelling of 215368944 in words is "two hundred fifteen million, three hundred sixty-eight thousand, nine hundred forty-four".