28353864 has 128 divisors (see below), whose sum is σ = 90086400. Its totient is φ = 7223040.

The previous prime is 28353863. The next prime is 28353881. The reversal of 28353864 is 46835382.

It is not an unprimeable number, because it can be changed into a prime (28353863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123702 + ... + 123930.

It is an arithmetic number, because the mean of its divisors is an integer number (703800).

Almost surely, 2^28353864 is an apocalyptic number.

28353864 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 28353864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45043200).

28353864 is an abundant number, since it is smaller than the sum of its proper divisors (61732536).

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

28353864 is a wasteful number, since it uses less digits than its factorization.

28353864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 319 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 28353864 is about 5324.8346453200. The cubic root of 28353864 is about 304.9327595210.

The spelling of 28353864 in words is "twenty-eight million, three hundred fifty-three thousand, eight hundred sixty-four".