28683408 has 80 divisors (see below), whose sum is σ = 81730880. Its totient is φ = 8612352.

The previous prime is 28683377. The next prime is 28683409. The reversal of 28683408 is 80438682.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28683409) 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, 26298 + ... + 27366.

It is an arithmetic number, because the mean of its divisors is an integer number (1021636).

Almost surely, 2^28683408 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 28683408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40865440).

28683408 is an abundant number, since it is smaller than the sum of its proper divisors (53047472).

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

28683408 is a wasteful number, since it uses less digits than its factorization.

28683408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 28683408 is about 5355.6893113772. The cubic root of 28683408 is about 306.1095767162.

The spelling of 28683408 in words is "twenty-eight million, six hundred eighty-three thousand, four hundred eight".