28216152 has 24 divisors (see below), whose sum is σ = 76418940. Its totient is φ = 9405360.

The previous prime is 28216151. The next prime is 28216157. The reversal of 28216152 is 25161282.

It is a happy number.

28216152 is a `hidden beast` number, since 28 + 21 + 615 + 2 = 666.

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 (28216151) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 195874 + ... + 196017.

Almost surely, 2^28216152 is an apocalyptic number.

It is an amenable number.

28216152 is an abundant number, since it is smaller than the sum of its proper divisors (48202788).

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

28216152 is a wasteful number, since it uses less digits than its factorization.

28216152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391903 (or 391896 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 28216152 is about 5311.8878000199. The cubic root of 28216152 is about 304.4382817151.

The spelling of 28216152 in words is "twenty-eight million, two hundred sixteen thousand, one hundred fifty-two".