28425473 has 2 divisors, whose sum is σ = 28425474. Its totient is φ = 28425472.

The previous prime is 28425431. The next prime is 28425491. The reversal of 28425473 is 37452482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27804529 + 620944 = 5273^2 + 788^2 .

It is a cyclic number.

It is not a de Polignac number, because 28425473 - 2¹² = 28421377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28425403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14212736 + 14212737.

It is an arithmetic number, because the mean of its divisors is an integer number (14212737).

Almost surely, 2^28425473 is an apocalyptic number.

It is an amenable number.

28425473 is a deficient number, since it is larger than the sum of its proper divisors (1).

28425473 is an equidigital number, since it uses as much as digits as its factorization.

28425473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 35.

The square root of 28425473 is about 5331.5544637563. The cubic root of 28425473 is about 305.1892509957.

The spelling of 28425473 in words is "twenty-eight million, four hundred twenty-five thousand, four hundred seventy-three".