28470285 has 20 divisors (see below), whose sum is σ = 51036348. Its totient is φ = 15183936.

The previous prime is 28470283. The next prime is 28470287. The reversal of 28470285 is 58207482.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28470283) and next prime (28470287).

It can be written as a sum of positive squares in 2 ways, for example, as 15896169 + 12574116 = 3987^2 + 3546^2 .

It is not a de Polignac number, because 28470285 - 2¹ = 28470283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28470283) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34744 + ... + 35553.

Almost surely, 2^28470285 is an apocalyptic number.

It is an amenable number.

28470285 is a deficient number, since it is larger than the sum of its proper divisors (22566063).

28470285 is an equidigital number, since it uses as much as digits as its factorization.

28470285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70314 (or 70305 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 28470285 is about 5335.7553354703. The cubic root of 28470285 is about 305.3495410322.

The spelling of 28470285 in words is "twenty-eight million, four hundred seventy thousand, two hundred eighty-five".