215072828 has 6 divisors (see below), whose sum is σ = 376377456. Its totient is φ = 107536412.

The previous prime is 215072827. The next prime is 215072833. The reversal of 215072828 is 828270512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215072821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26884100 + ... + 26884107.

It is an arithmetic number, because the mean of its divisors is an integer number (62729576).

Almost surely, 2^215072828 is an apocalyptic number.

It is an amenable number.

215072828 is a deficient number, since it is larger than the sum of its proper divisors (161304628).

215072828 is a wasteful number, since it uses less digits than its factorization.

215072828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53768211 (or 53768209 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 215072828 is about 14665.3615025338. The cubic root of 215072828 is about 599.1402761205.

The spelling of 215072828 in words is "two hundred fifteen million, seventy-two thousand, eight hundred twenty-eight".