28317744 has 120 divisors (see below), whose sum is σ = 97584032. Its totient is φ = 7464960.

The previous prime is 28317727. The next prime is 28317749. The reversal of 28317744 is 44771382.

It is a happy number.

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

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 = 28317699 and 28317708.

It is not an unprimeable number, because it can be changed into a prime (28317749) 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, 12024 + ... + 14184.

Almost surely, 2^28317744 is an apocalyptic number.

28317744 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 28317744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48792016).

28317744 is an abundant number, since it is smaller than the sum of its proper divisors (69266288).

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

28317744 is a wasteful number, since it uses less digits than its factorization.

28317744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195 (or 2186 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 28317744 is about 5321.4419098586. The cubic root of 28317744 is about 304.8032198391.

The spelling of 28317744 in words is "twenty-eight million, three hundred seventeen thousand, seven hundred forty-four".