28465784 has 8 divisors (see below), whose sum is σ = 53373360. Its totient is φ = 14232888.

The previous prime is 28465783. The next prime is 28465807. The reversal of 28465784 is 48756482.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28465783) 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 as a sum of consecutive naturals, namely, 1779104 + ... + 1779119.

It is an arithmetic number, because the mean of its divisors is an integer number (6671670).

Almost surely, 2^28465784 is an apocalyptic number.

It is an amenable number.

28465784 is a deficient number, since it is larger than the sum of its proper divisors (24907576).

28465784 is a wasteful number, since it uses less digits than its factorization.

28465784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3558229 (or 3558225 counting only the distinct ones).

The product of its digits is 430080, while the sum is 44.

The square root of 28465784 is about 5335.3335415886. Note that the first 3 decimals coincide. The cubic root of 28465784 is about 305.3334488070. Note that the first 3 decimals are identical.

The spelling of 28465784 in words is "twenty-eight million, four hundred sixty-five thousand, seven hundred eighty-four".