28653828 has 36 divisors (see below), whose sum is σ = 77776272. Its totient is φ = 8186640.

The previous prime is 28653809. The next prime is 28653829. The reversal of 28653828 is 82835682.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 28653828.

It is not an unprimeable number, because it can be changed into a prime (28653829) 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 11 ways as a sum of consecutive naturals, for example, 23778 + ... + 24953.

It is an arithmetic number, because the mean of its divisors is an integer number (2160452).

Almost surely, 2^28653828 is an apocalyptic number.

28653828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28653828 is an abundant number, since it is smaller than the sum of its proper divisors (49122444).

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

28653828 is a wasteful number, since it uses less digits than its factorization.

28653828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48752 (or 48743 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 28653828 is about 5352.9270497551. The cubic root of 28653828 is about 306.0043145190.

The spelling of 28653828 in words is "twenty-eight million, six hundred fifty-three thousand, eight hundred twenty-eight".