28142479 has 4 divisors (see below), whose sum is σ = 28562584. Its totient is φ = 27722376.

The previous prime is 28142467. The next prime is 28142503. The reversal of 28142479 is 97424182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28142479 - 2⁵ = 28142447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28142419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209952 + ... + 210085.

It is an arithmetic number, because the mean of its divisors is an integer number (7140646).

Almost surely, 2^28142479 is an apocalyptic number.

28142479 is a deficient number, since it is larger than the sum of its proper divisors (420105).

28142479 is an equidigital number, since it uses as much as digits as its factorization.

28142479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420104.

The product of its digits is 32256, while the sum is 37.

The square root of 28142479 is about 5304.9485388644. The cubic root of 28142479 is about 304.1730857301.

The spelling of 28142479 in words is "twenty-eight million, one hundred forty-two thousand, four hundred seventy-nine".