28764816 has 40 divisors (see below), whose sum is σ = 78682464. Its totient is φ = 9024000.

The previous prime is 28764811. The next prime is 28764817. The reversal of 28764816 is 61846782.

It is not an unprimeable number, because it can be changed into a prime (28764811) 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 7 ways as a sum of consecutive naturals, for example, 16810 + ... + 18441.

Almost surely, 2^28764816 is an apocalyptic number.

It is an amenable number.

28764816 is an abundant number, since it is smaller than the sum of its proper divisors (49917648).

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

28764816 is a wasteful number, since it uses less digits than its factorization.

28764816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35279 (or 35273 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 28764816 is about 5363.2840685535. The cubic root of 28764816 is about 306.3988988001.

The spelling of 28764816 in words is "twenty-eight million, seven hundred sixty-four thousand, eight hundred sixteen".