28665142 has 24 divisors (see below), whose sum is σ = 48799296. Its totient is φ = 12606000.

The previous prime is 28665139. The next prime is 28665157. The reversal of 28665142 is 24156682.

It is a junction number, because it is equal to n+sod(n) for n = 28665098 and 28665107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5592 + ... + 9412.

It is an arithmetic number, because the mean of its divisors is an integer number (2033304).

Almost surely, 2^28665142 is an apocalyptic number.

28665142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28665142 is a deficient number, since it is larger than the sum of its proper divisors (20134154).

28665142 is a wasteful number, since it uses less digits than its factorization.

28665142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3876 (or 3865 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 28665142 is about 5353.9837504423. The cubic root of 28665142 is about 306.0445846153.

It can be divided in two parts, 2866 and 5142, that added together give a palindrome (8008).

The spelling of 28665142 in words is "twenty-eight million, six hundred sixty-five thousand, one hundred forty-two".