28275616 has 12 divisors (see below), whose sum is σ = 55667682. Its totient is φ = 14137792.

The previous prime is 28275613. The next prime is 28275619. The reversal of 28275616 is 61657282.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28275613) and next prime (28275619).

It can be written as a sum of positive squares in only one way, i.e., 19395216 + 8880400 = 4404^2 + 2980^2 .

It is not an unprimeable number, because it can be changed into a prime (28275613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 441775 + ... + 441838.

Almost surely, 2^28275616 is an apocalyptic number.

It is an amenable number.

28275616 is a deficient number, since it is larger than the sum of its proper divisors (27392066).

28275616 is an equidigital number, since it uses as much as digits as its factorization.

28275616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883623 (or 883615 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 28275616 is about 5317.4821109243. The cubic root of 28275616 is about 304.6519940094.

The spelling of 28275616 in words is "twenty-eight million, two hundred seventy-five thousand, six hundred sixteen".