28122336 has 144 divisors (see below), whose sum is σ = 90493200. Its totient is φ = 8490240.

The previous prime is 28122323. The next prime is 28122389. The reversal of 28122336 is 63322182.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

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, 104410 + ... + 104678.

It is an arithmetic number, because the mean of its divisors is an integer number (628425).

Almost surely, 2^28122336 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 28122336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45246600).

28122336 is an abundant number, since it is smaller than the sum of its proper divisors (62370864).

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

28122336 is a wasteful number, since it uses less digits than its factorization.

28122336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 285 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 28122336 is about 5303.0496886226. The cubic root of 28122336 is about 304.1004977059.

The spelling of 28122336 in words is "twenty-eight million, one hundred twenty-two thousand, three hundred thirty-six".