28779344 has 40 divisors (see below), whose sum is σ = 61469280. Its totient is φ = 12944000.

The previous prime is 28779329. The next prime is 28779347. The reversal of 28779344 is 44397782.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 28779295 and 28779304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28779347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16967 + ... + 18585.

It is an arithmetic number, because the mean of its divisors is an integer number (1536732).

Almost surely, 2^28779344 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 28779344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30734640).

28779344 is an abundant number, since it is smaller than the sum of its proper divisors (32689936).

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

28779344 is a wasteful number, since it uses less digits than its factorization.

28779344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739 (or 1733 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 28779344 is about 5364.6382916279. The cubic root of 28779344 is about 306.4504735434.

It can be divided in two parts, 2877 and 9344, that added together give a palindrome (12221).

The spelling of 28779344 in words is "twenty-eight million, seven hundred seventy-nine thousand, three hundred forty-four".