28030345 has 16 divisors (see below), whose sum is σ = 38908800. Its totient is φ = 18987264.

The previous prime is 28030333. The next prime is 28030357. The reversal of 28030345 is 54303082.

It is an interprime number because it is at equal distance from previous prime (28030333) and next prime (28030357).

It is a cyclic number.

It is not a de Polignac number, because 28030345 - 2⁷ = 28030217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1920 + ... + 7729.

It is an arithmetic number, because the mean of its divisors is an integer number (2431800).

Almost surely, 2^28030345 is an apocalyptic number.

It is an amenable number.

28030345 is a deficient number, since it is larger than the sum of its proper divisors (10878455).

28030345 is an equidigital number, since it uses as much as digits as its factorization.

28030345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9744.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 28030345 is about 5294.3691786652. The cubic root of 28030345 is about 303.7685543601.

It can be divided in two parts, 280 and 30345, that added together give a square (30625 = 175²).

The spelling of 28030345 in words is "twenty-eight million, thirty thousand, three hundred forty-five".