28304064 has 42 divisors (see below), whose sum is σ = 81130140. Its totient is φ = 9434496.

The previous prime is 28304057. The next prime is 28304077. The reversal of 28304064 is 46040382.

It is a super-2 number, since 2×28304064² = 1602240077832192, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23994 + ... + 25145.

It is an arithmetic number, because the mean of its divisors is an integer number (1931670).

Almost surely, 2^28304064 is an apocalyptic number.

28304064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28304064 is an abundant number, since it is smaller than the sum of its proper divisors (52826076).

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

28304064 is a wasteful number, since it uses less digits than its factorization.

28304064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49157 (or 49144 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 28304064 is about 5320.1563886788. The cubic root of 28304064 is about 304.7541295387.

The spelling of 28304064 in words is "twenty-eight million, three hundred four thousand, sixty-four".