28272473 has 2 divisors, whose sum is σ = 28272474. Its totient is φ = 28272472.

The previous prime is 28272469. The next prime is 28272481. The reversal of 28272473 is 37427282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26956864 + 1315609 = 5192^2 + 1147^2 .

It is a cyclic number.

It is not a de Polignac number, because 28272473 - 2² = 28272469 is a prime.

It is equal to p_1757339 and since 28272473 and 1757339 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28272443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14136236 + 14136237.

It is an arithmetic number, because the mean of its divisors is an integer number (14136237).

Almost surely, 2^28272473 is an apocalyptic number.

It is an amenable number.

28272473 is a deficient number, since it is larger than the sum of its proper divisors (1).

28272473 is an equidigital number, since it uses as much as digits as its factorization.

28272473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 35.

The square root of 28272473 is about 5317.1865681016. The cubic root of 28272473 is about 304.6407056411.

The spelling of 28272473 in words is "twenty-eight million, two hundred seventy-two thousand, four hundred seventy-three".