28142793 has 24 divisors (see below), whose sum is σ = 46919808. Its totient is φ = 15921792.

The previous prime is 28142791. The next prime is 28142797. The reversal of 28142793 is 39724182.

It is not a de Polignac number, because 28142793 - 2¹ = 28142791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28142791) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4321 + ... + 8657.

It is an arithmetic number, because the mean of its divisors is an integer number (1954992).

Almost surely, 2^28142793 is an apocalyptic number.

It is an amenable number.

28142793 is a deficient number, since it is larger than the sum of its proper divisors (18777015).

28142793 is a wasteful number, since it uses less digits than its factorization.

28142793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4453 (or 4450 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 28142793 is about 5304.9781337909. The cubic root of 28142793 is about 304.1742169974.

The spelling of 28142793 in words is "twenty-eight million, one hundred forty-two thousand, seven hundred ninety-three".