28252136 has 16 divisors (see below), whose sum is σ = 57788640. Its totient is φ = 12841840.

The previous prime is 28252117. The next prime is 28252151. The reversal of 28252136 is 63125282.

It is a junction number, because it is equal to n+sod(n) for n = 28252099 and 28252108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160436 + ... + 160611.

It is an arithmetic number, because the mean of its divisors is an integer number (3611790).

Almost surely, 2^28252136 is an apocalyptic number.

It is an amenable number.

28252136 is an abundant number, since it is smaller than the sum of its proper divisors (29536504).

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

28252136 is a wasteful number, since it uses less digits than its factorization.

28252136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321064 (or 321060 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 28252136 is about 5315.2738405467. The cubic root of 28252136 is about 304.5676432418.

The spelling of 28252136 in words is "twenty-eight million, two hundred fifty-two thousand, one hundred thirty-six".