28964784 has 80 divisors (see below), whose sum is σ = 78709248. Its totient is φ = 9167616.

The previous prime is 28964779. The next prime is 28964791. The reversal of 28964784 is 48746982.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83299 + ... + 83645.

Almost surely, 2^28964784 is an apocalyptic number.

28964784 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 28964784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39354624).

28964784 is an abundant number, since it is smaller than the sum of its proper divisors (49744464).

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

28964784 is a wasteful number, since it uses less digits than its factorization.

28964784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 436 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The square root of 28964784 is about 5381.8940903738. The cubic root of 28964784 is about 307.1072704604.

The spelling of 28964784 in words is "twenty-eight million, nine hundred sixty-four thousand, seven hundred eighty-four".