28193767 has 12 divisors (see below), whose sum is σ = 33562056. Its totient is φ = 23602320.

The previous prime is 28193761. The next prime is 28193813. The reversal of 28193767 is 76739182.

It is a happy number.

It is not a de Polignac number, because 28193767 - 2⁷ = 28193639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28193761) 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, 4584 + ... + 8797.

It is an arithmetic number, because the mean of its divisors is an integer number (2796838).

Almost surely, 2^28193767 is an apocalyptic number.

28193767 is a deficient number, since it is larger than the sum of its proper divisors (5368289).

28193767 is a wasteful number, since it uses less digits than its factorization.

28193767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13438 (or 13431 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 28193767 is about 5309.7803156063. The cubic root of 28193767 is about 304.3577527342.

The spelling of 28193767 in words is "twenty-eight million, one hundred ninety-three thousand, seven hundred sixty-seven".