28023777 has 12 divisors (see below), whose sum is σ = 40684800. Its totient is φ = 18587448.

The previous prime is 28023767. The next prime is 28023781. The reversal of 28023777 is 77732082.

28023777 is a `hidden beast` number, since 280 + 2 + 377 + 7 = 666.

It is not a de Polignac number, because 28023777 - 2⁶ = 28023713 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28023707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6033 + ... + 9614.

It is an arithmetic number, because the mean of its divisors is an integer number (3390400).

Almost surely, 2^28023777 is an apocalyptic number.

It is an amenable number.

28023777 is a deficient number, since it is larger than the sum of its proper divisors (12661023).

28023777 is a wasteful number, since it uses less digits than its factorization.

28023777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15852 (or 15849 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 28023777 is about 5293.7488606846. The cubic root of 28023777 is about 303.7448264119.

The spelling of 28023777 in words is "twenty-eight million, twenty-three thousand, seven hundred seventy-seven".