28449835 has 4 divisors (see below), whose sum is σ = 34139808. Its totient is φ = 22759864.

The previous prime is 28449833. The next prime is 28449871. The reversal of 28449835 is 53894482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28449835 - 2¹ = 28449833 is a prime.

It is a super-2 number, since 2×28449835² = 1618786223054450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28449791 and 28449800.

It is not an unprimeable number, because it can be changed into a prime (28449833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2844979 + ... + 2844988.

It is an arithmetic number, because the mean of its divisors is an integer number (8534952).

Almost surely, 2^28449835 is an apocalyptic number.

28449835 is a deficient number, since it is larger than the sum of its proper divisors (5689973).

28449835 is an equidigital number, since it uses as much as digits as its factorization.

28449835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5689972.

The product of its digits is 276480, while the sum is 43.

The square root of 28449835 is about 5333.8386739758. The cubic root of 28449835 is about 305.2764133974.

The spelling of 28449835 in words is "twenty-eight million, four hundred forty-nine thousand, eight hundred thirty-five".