28212032 has 56 divisors (see below), whose sum is σ = 58375296. Its totient is φ = 13518848.

The previous prime is 28212013. The next prime is 28212043. The reversal of 28212032 is 23021282.

It is a junction number, because it is equal to n+sod(n) for n = 28211995 and 28212013.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 249608 + ... + 249720.

It is an arithmetic number, because the mean of its divisors is an integer number (1042416).

Almost surely, 2^28212032 is an apocalyptic number.

It is a pronic number, being equal to 5311×5312.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28212032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29187648).

28212032 is an abundant number, since it is smaller than the sum of its proper divisors (30163264).

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

28212032 is a wasteful number, since it uses less digits than its factorization.

28212032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 28212032 is about 5311.4999764662. The cubic root of 28212032 is about 304.4234634085.

The spelling of 28212032 in words is "twenty-eight million, two hundred twelve thousand, thirty-two".