28087047 has 16 divisors (see below), whose sum is σ = 41702880. Its totient is φ = 18683136.

The previous prime is 28087021. The next prime is 28087049. The reversal of 28087047 is 74078082.

It is not a de Polignac number, because 28087047 - 2⁶ = 28086983 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28087049) 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, 15703 + ... + 17399.

It is an arithmetic number, because the mean of its divisors is an integer number (2606430).

Almost surely, 2^28087047 is an apocalyptic number.

28087047 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28087047 is a deficient number, since it is larger than the sum of its proper divisors (13615833).

28087047 is a wasteful number, since it uses less digits than its factorization.

28087047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319 (or 2313 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 28087047 is about 5299.7214077723. The cubic root of 28087047 is about 303.9732454236.

The spelling of 28087047 in words is "twenty-eight million, eighty-seven thousand, forty-seven".