28687011 has 8 divisors (see below), whose sum is σ = 38328000. Its totient is φ = 19085352.

The previous prime is 28686991. The next prime is 28687013. The reversal of 28687011 is 11078682.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28687011 - 2⁹ = 28686499 is a prime.

It is a super-2 number, since 2×28687011² = 1645889200228242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28687013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8085 + ... + 11078.

It is an arithmetic number, because the mean of its divisors is an integer number (4791000).

Almost surely, 2^28687011 is an apocalyptic number.

28687011 is a deficient number, since it is larger than the sum of its proper divisors (9640989).

28687011 is a wasteful number, since it uses less digits than its factorization.

28687011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19665.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 28687011 is about 5356.0256720819. The cubic root of 28687011 is about 306.1223932619.

The spelling of 28687011 in words is "twenty-eight million, six hundred eighty-seven thousand, eleven".