28523156 has 6 divisors (see below), whose sum is σ = 49915530. Its totient is φ = 14261576.

The previous prime is 28523119. The next prime is 28523177. The reversal of 28523156 is 65132582.

It can be written as a sum of positive squares in only one way, i.e., 16273156 + 12250000 = 4034^2 + 3500^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3565391 + ... + 3565398.

It is an arithmetic number, because the mean of its divisors is an integer number (8319255).

Almost surely, 2^28523156 is an apocalyptic number.

It is an amenable number.

28523156 is a deficient number, since it is larger than the sum of its proper divisors (21392374).

28523156 is a wasteful number, since it uses less digits than its factorization.

28523156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7130793 (or 7130791 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 28523156 is about 5340.7074437756. The cubic root of 28523156 is about 305.5384415220.

The spelling of 28523156 in words is "twenty-eight million, five hundred twenty-three thousand, one hundred fifty-six".