28750064 has 30 divisors (see below), whose sum is σ = 64799424. Its totient is φ = 12321120.

The previous prime is 28750031. The next prime is 28750067. The reversal of 28750064 is 46005782.

28750064 is nontrivially palindromic in base 6.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28750064.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28750067) by changing a digit.

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, 17552 + ... + 19119.

Almost surely, 2^28750064 is an apocalyptic number.

It is an amenable number.

28750064 is an abundant number, since it is smaller than the sum of its proper divisors (36049360).

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

28750064 is a wasteful number, since it uses less digits than its factorization.

28750064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36693 (or 36680 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 28750064 is about 5361.9086154093. The cubic root of 28750064 is about 306.3465110791.

The spelling of 28750064 in words is "twenty-eight million, seven hundred fifty thousand, sixty-four".