28142963 has 4 divisors (see below), whose sum is σ = 29113440. Its totient is φ = 27172488.

The previous prime is 28142953. The next prime is 28142981. The reversal of 28142963 is 36924182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28142963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28142953) 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, 485195 + ... + 485252.

It is an arithmetic number, because the mean of its divisors is an integer number (7278360).

Almost surely, 2^28142963 is an apocalyptic number.

28142963 is a deficient number, since it is larger than the sum of its proper divisors (970477).

28142963 is an equidigital number, since it uses as much as digits as its factorization.

28142963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970476.

The product of its digits is 20736, while the sum is 35.

The square root of 28142963 is about 5304.9941564530. The cubic root of 28142963 is about 304.1748294634.

The spelling of 28142963 in words is "twenty-eight million, one hundred forty-two thousand, nine hundred sixty-three".