28006767 has 6 divisors (see below), whose sum is σ = 40454232. Its totient is φ = 18671172.

The previous prime is 28006763. The next prime is 28006777. The reversal of 28006767 is 76760082.

It is not a de Polignac number, because 28006767 - 2² = 28006763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28006763) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1555923 + ... + 1555940.

It is an arithmetic number, because the mean of its divisors is an integer number (6742372).

Almost surely, 2^28006767 is an apocalyptic number.

28006767 is a deficient number, since it is larger than the sum of its proper divisors (12447465).

28006767 is a wasteful number, since it uses less digits than its factorization.

28006767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3111869 (or 3111866 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 28006767 is about 5292.1420048974. The cubic root of 28006767 is about 303.6833578333.

The spelling of 28006767 in words is "twenty-eight million, six thousand, seven hundred sixty-seven".