28868771 has 16 divisors (see below), whose sum is σ = 32457600. Its totient is φ = 25515648.

The previous prime is 28868761. The next prime is 28868773. The reversal of 28868771 is 17786882.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28868771 - 2¹⁴ = 28852387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28868773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44576 + ... + 45218.

It is an arithmetic number, because the mean of its divisors is an integer number (2028600).

Almost surely, 2^28868771 is an apocalyptic number.

28868771 is a deficient number, since it is larger than the sum of its proper divisors (3588829).

28868771 is a wasteful number, since it uses less digits than its factorization.

28868771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818.

The product of its digits is 301056, while the sum is 47.

The square root of 28868771 is about 5372.9666851750. The cubic root of 28868771 is about 306.7675598765.

The spelling of 28868771 in words is "twenty-eight million, eight hundred sixty-eight thousand, seven hundred seventy-one".