28715064 has 64 divisors (see below), whose sum is σ = 83462400. Its totient is φ = 8062464.

The previous prime is 28715051. The next prime is 28715087. The reversal of 28715064 is 46051782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8464 + ... + 11360.

It is an arithmetic number, because the mean of its divisors is an integer number (1304100).

Almost surely, 2^28715064 is an apocalyptic number.

28715064 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 28715064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41731200).

28715064 is an abundant number, since it is smaller than the sum of its proper divisors (54747336).

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

28715064 is a wasteful number, since it uses less digits than its factorization.

28715064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2972 (or 2968 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 28715064 is about 5358.6438582910. The cubic root of 28715064 is about 306.2221463492. Note that the first 3 decimals are identical.

It can be divided in two parts, 287 and 15064, that added together give a palindrome (15351).

The spelling of 28715064 in words is "twenty-eight million, seven hundred fifteen thousand, sixty-four".