28344732 has 96 divisors (see below), whose sum is σ = 76581120. Its totient is φ = 8087040.

The previous prime is 28344731. The next prime is 28344739. The reversal of 28344732 is 23744382.

It is a junction number, because it is equal to n+sod(n) for n = 28344693 and 28344702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28344731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 216307 + ... + 216437.

It is an arithmetic number, because the mean of its divisors is an integer number (797720).

Almost surely, 2^28344732 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 28344732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38290560).

28344732 is an abundant number, since it is smaller than the sum of its proper divisors (48236388).

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

28344732 is a wasteful number, since it uses less digits than its factorization.

28344732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 241 counting only the distinct ones).

The product of its digits is 32256, while the sum is 33.

The square root of 28344732 is about 5323.9770848493. The cubic root of 28344732 is about 304.9000191866.

The spelling of 28344732 in words is "twenty-eight million, three hundred forty-four thousand, seven hundred thirty-two".