28243270 has 16 divisors (see below), whose sum is σ = 55459728. Its totient is φ = 10270240.

The previous prime is 28243261. The next prime is 28243283. The reversal of 28243270 is 7234282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128269 + ... + 128488.

It is an arithmetic number, because the mean of its divisors is an integer number (3466233).

Almost surely, 2^28243270 is an apocalyptic number.

28243270 is a deficient number, since it is larger than the sum of its proper divisors (27216458).

28243270 is a wasteful number, since it uses less digits than its factorization.

28243270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256775.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 28243270 is about 5314.4397635122. The cubic root of 28243270 is about 304.5357804092.

The spelling of 28243270 in words is "twenty-eight million, two hundred forty-three thousand, two hundred seventy".