8400849 has 4 divisors (see below), whose sum is σ = 11201136. Its totient is φ = 5600564.

The previous prime is 8400841. The next prime is 8400851. The reversal of 8400849 is 9480048.

8400849 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8400849 - 2³ = 8400841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8400841) 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, 1400139 + ... + 1400144.

It is an arithmetic number, because the mean of its divisors is an integer number (2800284).

Almost surely, 2^8400849 is an apocalyptic number.

It is an amenable number.

8400849 is a deficient number, since it is larger than the sum of its proper divisors (2800287).

8400849 is a wasteful number, since it uses less digits than its factorization.

8400849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800286.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 8400849 is about 2898.4218119522. The cubic root of 8400849 is about 203.2861197077.

The spelling of 8400849 in words is "eight million, four hundred thousand, eight hundred forty-nine".