28853440 has 112 divisors (see below), whose sum is σ = 85734144. Its totient is φ = 8985600.

The previous prime is 28853423. The next prime is 28853443. The reversal of 28853440 is 4435882.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 28853396 and 28853405.

It is not an unprimeable number, because it can be changed into a prime (28853443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24055 + ... + 25225.

Almost surely, 2^28853440 is an apocalyptic number.

28853440 is a gapful number since it is divisible by the number (20) 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 28853440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42867072).

28853440 is an abundant number, since it is smaller than the sum of its proper divisors (56880704).

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

28853440 is a wasteful number, since it uses less digits than its factorization.

28853440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206 (or 1196 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 28853440 is about 5371.5398164772. The cubic root of 28853440 is about 306.7132464428.

Subtracting from 28853440 its sum of digits (34), we obtain a triangular number (28853406 = T₇₅₉₆).

The spelling of 28853440 in words is "twenty-eight million, eight hundred fifty-three thousand, four hundred forty".