28646232 has 64 divisors (see below), whose sum is σ = 74726400. Its totient is φ = 9141120.

The previous prime is 28646221. The next prime is 28646239. The reversal of 28646232 is 23264682.

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

It is a junction number, because it is equal to n+sod(n) for n = 28646193 and 28646202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28646239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103278 + ... + 103554.

It is an arithmetic number, because the mean of its divisors is an integer number (1167600).

Almost surely, 2^28646232 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 28646232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37363200).

28646232 is an abundant number, since it is smaller than the sum of its proper divisors (46080168).

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

28646232 is a wasteful number, since it uses less digits than its factorization.

28646232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 452 counting only the distinct ones).

The product of its digits is 27648, while the sum is 33.

The square root of 28646232 is about 5352.2174843704. The cubic root of 28646232 is about 305.9772720101.

The spelling of 28646232 in words is "twenty-eight million, six hundred forty-six thousand, two hundred thirty-two".