215293028 has 12 divisors (see below), whose sum is σ = 396592560. Its totient is φ = 101980872.

The previous prime is 215293019. The next prime is 215293031. The reversal of 215293028 is 820392512.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 215292985 and 215293003.

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 3 ways as a sum of consecutive naturals, for example, 1416326 + ... + 1416477.

It is an arithmetic number, because the mean of its divisors is an integer number (33049380).

Almost surely, 2^215293028 is an apocalyptic number.

It is an amenable number.

215293028 is a deficient number, since it is larger than the sum of its proper divisors (181299532).

215293028 is a wasteful number, since it uses less digits than its factorization.

215293028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832826 (or 2832824 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 215293028 is about 14672.8670681636. The cubic root of 215293028 is about 599.3446808182.

The spelling of 215293028 in words is "two hundred fifteen million, two hundred ninety-three thousand, twenty-eight".