28487611 has 4 divisors (see below), whose sum is σ = 28518952. Its totient is φ = 28456272.

The previous prime is 28487603. The next prime is 28487617. The reversal of 28487611 is 11678482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28487611 - 2³ = 28487603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28487617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14265 + ... + 16138.

It is an arithmetic number, because the mean of its divisors is an integer number (7129738).

Almost surely, 2^28487611 is an apocalyptic number.

28487611 is a deficient number, since it is larger than the sum of its proper divisors (31341).

28487611 is an equidigital number, since it uses as much as digits as its factorization.

28487611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31340.

The product of its digits is 21504, while the sum is 37.

The square root of 28487611 is about 5337.3786637262. The cubic root of 28487611 is about 305.4114700846.

The spelling of 28487611 in words is "twenty-eight million, four hundred eighty-seven thousand, six hundred eleven".