42836449 has 4 divisors (see below), whose sum is σ = 42849540. Its totient is φ = 42823360.

The previous prime is 42836429. The next prime is 42836531. The reversal of 42836449 is 94463824.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 39150049 + 3686400 = 6257^2 + 1920^2 .

It is a cyclic number.

It is not a de Polignac number, because 42836449 - 2¹¹ = 42834401 is a prime.

It is a super-2 number, since 2×42836449² = 3669922725859202, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42836429) 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, 3237 + ... + 9805.

It is an arithmetic number, because the mean of its divisors is an integer number (10712385).

Almost surely, 2^42836449 is an apocalyptic number.

It is an amenable number.

42836449 is a deficient number, since it is larger than the sum of its proper divisors (13091).

42836449 is an equidigital number, since it uses as much as digits as its factorization.

42836449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13090.

The product of its digits is 165888, while the sum is 40.

The square root of 42836449 is about 6544.9559967963. The cubic root of 42836449 is about 349.8950678636.

The spelling of 42836449 in words is "forty-two million, eight hundred thirty-six thousand, four hundred forty-nine".