28142302 has 4 divisors (see below), whose sum is σ = 42213456. Its totient is φ = 14071150.

The previous prime is 28142299. The next prime is 28142321. The reversal of 28142302 is 20324182.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7035574 + ... + 7035577.

It is an arithmetic number, because the mean of its divisors is an integer number (10553364).

Almost surely, 2^28142302 is an apocalyptic number.

28142302 is a deficient number, since it is larger than the sum of its proper divisors (14071154).

28142302 is a wasteful number, since it uses less digits than its factorization.

28142302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14071153.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 28142302 is about 5304.9318563013. The cubic root of 28142302 is about 304.1724480376.

Adding to 28142302 its reverse (20324182), we get a palindrome (48466484).

The spelling of 28142302 in words is "twenty-eight million, one hundred forty-two thousand, three hundred two".