28185652 has 12 divisors (see below), whose sum is σ = 53809056. Its totient is φ = 12811640.

The previous prime is 28185631. The next prime is 28185659. The reversal of 28185652 is 25658182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28185659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320248 + ... + 320335.

It is an arithmetic number, because the mean of its divisors is an integer number (4484088).

Almost surely, 2^28185652 is an apocalyptic number.

28185652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28185652 is a deficient number, since it is larger than the sum of its proper divisors (25623404).

28185652 is a wasteful number, since it uses less digits than its factorization.

28185652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640598 (or 640596 counting only the distinct ones).

The product of its digits is 38400, while the sum is 37.

The square root of 28185652 is about 5309.0161047034. The cubic root of 28185652 is about 304.3285488778.

The spelling of 28185652 in words is "twenty-eight million, one hundred eighty-five thousand, six hundred fifty-two".