28246555 has 4 divisors (see below), whose sum is σ = 33895872. Its totient is φ = 22597240.

The previous prime is 28246541. The next prime is 28246573. The reversal of 28246555 is 55564282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55564282 = 2 ⋅27782141.

It is a de Polignac number, because none of the positive numbers 2^k-28246555 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2824651 + ... + 2824660.

It is an arithmetic number, because the mean of its divisors is an integer number (8473968).

Almost surely, 2^28246555 is an apocalyptic number.

28246555 is a deficient number, since it is larger than the sum of its proper divisors (5649317).

28246555 is an equidigital number, since it uses as much as digits as its factorization.

28246555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5649316.

The product of its digits is 96000, while the sum is 37.

The square root of 28246555 is about 5314.7488181475. The cubic root of 28246555 is about 304.5475868945.

The spelling of 28246555 in words is "twenty-eight million, two hundred forty-six thousand, five hundred fifty-five".