4396439644 has 12 divisors (see below), whose sum is σ = 7694323000. Its totient is φ = 2198061648.

The previous prime is 4396439599. The next prime is 4396439657. The reversal of 4396439644 is 4469346934.

It is a junction number, because it is equal to n+sod(n) for n = 4396439591 and 4396439600.

It is a congruent 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, 41407 + ... + 102505.

Almost surely, 2^4396439644 is an apocalyptic number.

It is an amenable number.

4396439644 is a deficient number, since it is larger than the sum of its proper divisors (3297883356).

4396439644 is a wasteful number, since it uses less digits than its factorization.

4396439644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79092 (or 79090 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 52.

The square root of 4396439644 is about 66305.6531828169. The cubic root of 4396439644 is about 1638.2004408133.

The spelling of 4396439644 in words is "four billion, three hundred ninety-six million, four hundred thirty-nine thousand, six hundred forty-four".