28254143 has 4 divisors (see below), whose sum is σ = 29482608. Its totient is φ = 27025680.

The previous prime is 28254103. The next prime is 28254157. The reversal of 28254143 is 34145282.

It is a happy number.

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 28254143 - 2⁸ = 28253887 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 (28254103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 614198 + ... + 614243.

It is an arithmetic number, because the mean of its divisors is an integer number (7370652).

Almost surely, 2^28254143 is an apocalyptic number.

28254143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28254143 is a deficient number, since it is larger than the sum of its proper divisors (1228465).

28254143 is a wasteful number, since it uses less digits than its factorization.

28254143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228464.

The product of its digits is 7680, while the sum is 29.

The square root of 28254143 is about 5315.4626327348. The cubic root of 28254143 is about 304.5748551188.

The spelling of 28254143 in words is "twenty-eight million, two hundred fifty-four thousand, one hundred forty-three".