215788 has 12 divisors (see below), whose sum is σ = 383320. Its totient is φ = 106272.

The previous prime is 215771. The next prime is 215797. The reversal of 215788 is 887512.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

215788 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78 + ... + 661.

2²¹⁵⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

215788 is a deficient number, since it is larger than the sum of its proper divisors (167532).

215788 is a wasteful number, since it uses less digits than its factorization.

215788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816 (or 814 counting only the distinct ones).

The product of its digits is 4480, while the sum is 31.

The square root of 215788 is about 464.5298698685. The cubic root of 215788 is about 59.9803639448.

The spelling of 215788 in words is "two hundred fifteen thousand, seven hundred eighty-eight".