28142723 has 8 divisors (see below), whose sum is σ = 32570880. Its totient is φ = 23816520.

The previous prime is 28142717. The next prime is 28142729. The reversal of 28142723 is 32724182.

It is an interprime number because it is at equal distance from previous prime (28142717) and next prime (28142729).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28142723 - 2⁶ = 28142659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28142729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24893 + ... + 25998.

It is an arithmetic number, because the mean of its divisors is an integer number (4071360).

Almost surely, 2^28142723 is an apocalyptic number.

28142723 is a deficient number, since it is larger than the sum of its proper divisors (4428157).

28142723 is an equidigital number, since it uses as much as digits as its factorization.

28142723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50977.

The product of its digits is 5376, while the sum is 29.

The square root of 28142723 is about 5304.9715362102. The cubic root of 28142723 is about 304.1739648048.

The spelling of 28142723 in words is "twenty-eight million, one hundred forty-two thousand, seven hundred twenty-three".