28122264 has 48 divisors (see below), whose sum is σ = 76747320. Its totient is φ = 9302400.

The previous prime is 28122253. The next prime is 28122271. The reversal of 28122264 is 46222182.

It is a happy number.

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 11 ways as a sum of consecutive naturals, for example, 8439 + ... + 11289.

Almost surely, 2^28122264 is an apocalyptic number.

28122264 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 28122264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38373660).

28122264 is an abundant number, since it is smaller than the sum of its proper divisors (48625056).

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

28122264 is a wasteful number, since it uses less digits than its factorization.

28122264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000 (or 2993 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 28122264 is about 5303.0429000716. The cubic root of 28122264 is about 304.1002381820.

The spelling of 28122264 in words is "twenty-eight million, one hundred twenty-two thousand, two hundred sixty-four".