28380764 has 12 divisors (see below), whose sum is σ = 49890624. Its totient is φ = 14126304.

The previous prime is 28380761. The next prime is 28380773. The reversal of 28380764 is 46708382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28380761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15017 + ... + 16800.

It is an arithmetic number, because the mean of its divisors is an integer number (4157552).

Almost surely, 2^28380764 is an apocalyptic number.

It is an amenable number.

28380764 is a deficient number, since it is larger than the sum of its proper divisors (21509860).

28380764 is a wasteful number, since it uses less digits than its factorization.

28380764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32044 (or 32042 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 28380764 is about 5327.3599465401. The cubic root of 28380764 is about 305.0291614149.

The spelling of 28380764 in words is "twenty-eight million, three hundred eighty thousand, seven hundred sixty-four".