28272470 has 16 divisors (see below), whose sum is σ = 51386400. Its totient is φ = 11198784.

The previous prime is 28272469. The next prime is 28272473. The reversal of 28272470 is 7427282.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28272473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12695 + ... + 14754.

It is an arithmetic number, because the mean of its divisors is an integer number (3211650).

Almost surely, 2^28272470 is an apocalyptic number.

28272470 is a deficient number, since it is larger than the sum of its proper divisors (23113930).

28272470 is a wasteful number, since it uses less digits than its factorization.

28272470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27559.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 28272470 is about 5317.1862859975. The cubic root of 28272470 is about 304.6406948660.

The spelling of 28272470 in words is "twenty-eight million, two hundred seventy-two thousand, four hundred seventy".