28215153 has 6 divisors (see below), whose sum is σ = 40755234. Its totient is φ = 18810096.

The previous prime is 28215149. The next prime is 28215163. The reversal of 28215153 is 35151282.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25280784 + 2934369 = 5028^2 + 1713^2 .

It is not a de Polignac number, because 28215153 - 2² = 28215149 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28215163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1567500 + ... + 1567517.

It is an arithmetic number, because the mean of its divisors is an integer number (6792539).

Almost surely, 2^28215153 is an apocalyptic number.

It is an amenable number.

28215153 is a deficient number, since it is larger than the sum of its proper divisors (12540081).

28215153 is a wasteful number, since it uses less digits than its factorization.

28215153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3135023 (or 3135020 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 28215153 is about 5311.7937648218. The cubic root of 28215153 is about 304.4346887679.

The spelling of 28215153 in words is "twenty-eight million, two hundred fifteen thousand, one hundred fifty-three".