215028788 has 12 divisors (see below), whose sum is σ = 405246660. Its totient is φ = 99244032.

The previous prime is 215028773. The next prime is 215028799. The reversal of 215028788 is 887820512.

It can be written as a sum of positive squares in 2 ways, for example, as 118635664 + 96393124 = 10892^2 + 9818^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2067533 + ... + 2067636.

It is an arithmetic number, because the mean of its divisors is an integer number (33770555).

Almost surely, 2^215028788 is an apocalyptic number.

It is an amenable number.

215028788 is a deficient number, since it is larger than the sum of its proper divisors (190217872).

215028788 is a wasteful number, since it uses less digits than its factorization.

215028788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4135186 (or 4135184 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 41.

The square root of 215028788 is about 14663.8599284090. The cubic root of 215028788 is about 599.0993784407.

The spelling of 215028788 in words is "two hundred fifteen million, twenty-eight thousand, seven hundred eighty-eight".