215928 has 24 divisors (see below), whose sum is σ = 585000. Its totient is φ = 71952.

The previous prime is 215927. The next prime is 215939. The reversal of 215928 is 829512.

215928 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1428 + ... + 1571.

It is an arithmetic number, because the mean of its divisors is an integer number (24375).

2²¹⁵⁹²⁸ is an apocalyptic number.

It is an amenable number.

215928 is an abundant number, since it is smaller than the sum of its proper divisors (369072).

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

215928 is a wasteful number, since it uses less digits than its factorization.

215928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011 (or 3004 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 215928 is about 464.6805354219. The cubic root of 215928 is about 59.9933325925.

It can be divided in two parts, 2159 and 28, that added together give a 7-th power (2187 = 3⁷).

The spelling of 215928 in words is "two hundred fifteen thousand, nine hundred twenty-eight".