28685468 has 12 divisors (see below), whose sum is σ = 57370992. Its totient is φ = 12293760.

The previous prime is 28685467. The next prime is 28685473. The reversal of 28685468 is 86458682.

28685468 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28685467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512213 + ... + 512268.

It is an arithmetic number, because the mean of its divisors is an integer number (4780916).

Almost surely, 2^28685468 is an apocalyptic number.

28685468 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28685468 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28685468 is a wasteful number, since it uses less digits than its factorization.

28685468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024492 (or 1024490 counting only the distinct ones).

The product of its digits is 737280, while the sum is 47.

The square root of 28685468 is about 5355.8816267726. The cubic root of 28685468 is about 306.1169046534.

The spelling of 28685468 in words is "twenty-eight million, six hundred eighty-five thousand, four hundred sixty-eight".