28770284 has 12 divisors (see below), whose sum is σ = 51173808. Its totient is φ = 14149200.

The previous prime is 28770283. The next prime is 28770289. The reversal of 28770284 is 48207782.

It is not an unprimeable number, because it can be changed into a prime (28770281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58712 + ... + 59199.

It is an arithmetic number, because the mean of its divisors is an integer number (4264484).

Almost surely, 2^28770284 is an apocalyptic number.

It is an amenable number.

28770284 is a deficient number, since it is larger than the sum of its proper divisors (22403524).

28770284 is a wasteful number, since it uses less digits than its factorization.

28770284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117976 (or 117974 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 28770284 is about 5363.7938066261. The cubic root of 28770284 is about 306.4183123669.

The spelling of 28770284 in words is "twenty-eight million, seven hundred seventy thousand, two hundred eighty-four".