4399400849 has 4 divisors (see below), whose sum is σ = 4399676340. Its totient is φ = 4399125360.

The previous prime is 4399400843. The next prime is 4399400857. The reversal of 4399400849 is 9480049934.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3350094400 + 1049306449 = 57880^2 + 32393^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4399400849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4399400797 and 4399400806.

It is not an unprimeable number, because it can be changed into a prime (4399400843) 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, 112214 + ... + 146255.

It is an arithmetic number, because the mean of its divisors is an integer number (1099919085).

Almost surely, 2^4399400849 is an apocalyptic number.

It is an amenable number.

4399400849 is a deficient number, since it is larger than the sum of its proper divisors (275491).

4399400849 is a wasteful number, since it uses less digits than its factorization.

4399400849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275490.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The square root of 4399400849 is about 66327.9793827612. The cubic root of 4399400849 is about 1638.5681594676.

The spelling of 4399400849 in words is "four billion, three hundred ninety-nine million, four hundred thousand, eight hundred forty-nine".