28656234 has 48 divisors (see below), whose sum is σ = 66056640. Its totient is φ = 9208080.

The previous prime is 28656227. The next prime is 28656247. The reversal of 28656234 is 43265682.

28656234 is a `hidden beast` number, since 28 + 6 + 5 + 623 + 4 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45099 + ... + 45729.

It is an arithmetic number, because the mean of its divisors is an integer number (1376180).

Almost surely, 2^28656234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28656234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33028320).

28656234 is an abundant number, since it is smaller than the sum of its proper divisors (37400406).

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

28656234 is a wasteful number, since it uses less digits than its factorization.

28656234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700 (or 665 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 28656234 is about 5353.1517818945. The cubic root of 28656234 is about 306.0128791196.

The spelling of 28656234 in words is "twenty-eight million, six hundred fifty-six thousand, two hundred thirty-four".