28617445 has 8 divisors (see below), whose sum is σ = 34398360. Its totient is φ = 22855680.

The previous prime is 28617431. The next prime is 28617481. The reversal of 28617445 is 54471682.

It can be written as a sum of positive squares in 4 ways, for example, as 1898884 + 26718561 = 1378^2 + 5169^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28617445 - 2¹¹ = 28615397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1260 + ... + 7669.

It is an arithmetic number, because the mean of its divisors is an integer number (4299795).

Almost surely, 2^28617445 is an apocalyptic number.

It is an amenable number.

28617445 is a deficient number, since it is larger than the sum of its proper divisors (5780915).

28617445 is an equidigital number, since it uses as much as digits as its factorization.

28617445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9575.

The product of its digits is 53760, while the sum is 37.

The square root of 28617445 is about 5349.5275492327. The cubic root of 28617445 is about 305.8747440422.

The spelling of 28617445 in words is "twenty-eight million, six hundred seventeen thousand, four hundred forty-five".