28229544 has 96 divisors (see below), whose sum is σ = 88608000. Its totient is φ = 7952256.

The previous prime is 28229527. The next prime is 28229567. The reversal of 28229544 is 44592282.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28229499 and 28229508.

It is a congruent 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, 39462 + ... + 40170.

It is an arithmetic number, because the mean of its divisors is an integer number (923000).

Almost surely, 2^28229544 is an apocalyptic number.

28229544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28229544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44304000).

28229544 is an abundant number, since it is smaller than the sum of its proper divisors (60378456).

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

28229544 is a wasteful number, since it uses less digits than its factorization.

28229544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807 (or 800 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 28229544 is about 5313.1482192764. The cubic root of 28229544 is about 304.4864384425.

The spelling of 28229544 in words is "twenty-eight million, two hundred twenty-nine thousand, five hundred forty-four".