28851256 has 32 divisors (see below), whose sum is σ = 62448480. Its totient is φ = 12240000.

The previous prime is 28851247. The next prime is 28851271. The reversal of 28851256 is 65215882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3106 + ... + 8206.

It is an arithmetic number, because the mean of its divisors is an integer number (1951515).

Almost surely, 2^28851256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28851256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31224240).

28851256 is an abundant number, since it is smaller than the sum of its proper divisors (33597224).

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

28851256 is a wasteful number, since it uses less digits than its factorization.

28851256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5215 (or 5211 counting only the distinct ones).

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

The square root of 28851256 is about 5371.3365189681. The cubic root of 28851256 is about 306.7055075778.

The spelling of 28851256 in words is "twenty-eight million, eight hundred fifty-one thousand, two hundred fifty-six".