28633356 has 72 divisors (see below), whose sum is σ = 75675600. Its totient is φ = 9120384.

The previous prime is 28633351. The next prime is 28633369. The reversal of 28633356 is 65333682.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28633356.

It is not an unprimeable number, because it can be changed into a prime (28633351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81870 + ... + 82218.

It is an arithmetic number, because the mean of its divisors is an integer number (1051050).

Almost surely, 2^28633356 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 28633356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37837800).

28633356 is an abundant number, since it is smaller than the sum of its proper divisors (47042244).

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

28633356 is a wasteful number, since it uses less digits than its factorization.

28633356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 450 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 28633356 is about 5351.0144832546. The cubic root of 28633356 is about 305.9314212587.

The spelling of 28633356 in words is "twenty-eight million, six hundred thirty-three thousand, three hundred fifty-six".