28143270 has 24 divisors (see below), whose sum is σ = 73172736. Its totient is φ = 7504848.

The previous prime is 28143263. The next prime is 28143281. The reversal of 28143270 is 7234182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156262 + ... + 156441.

It is an arithmetic number, because the mean of its divisors is an integer number (3048864).

Almost surely, 2^28143270 is an apocalyptic number.

28143270 is an abundant number, since it is smaller than the sum of its proper divisors (45029466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28143270 is a wasteful number, since it uses less digits than its factorization.

28143270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312716 (or 312713 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 28143270 is about 5305.0230913729. The cubic root of 28143270 is about 304.1759354987.

It can be divided in two parts, 2814 and 3270, that added together give a square (6084 = 78²).

The spelling of 28143270 in words is "twenty-eight million, one hundred forty-three thousand, two hundred seventy".