4399684644 has 24 divisors (see below), whose sum is σ = 10267367488. Its totient is φ = 1466356320.

The previous prime is 4399684591. The next prime is 4399684661. The reversal of 4399684644 is 4464869934.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81609 + ... + 124335.

Almost surely, 2^4399684644 is an apocalyptic number.

It is an amenable number.

4399684644 is an abundant number, since it is smaller than the sum of its proper divisors (5867682844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4399684644 is a wasteful number, since it uses less digits than its factorization.

4399684644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51315 (or 51313 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 57.

The square root of 4399684644 is about 66330.1186792244. The cubic root of 4399684644 is about 1638.6033921026.

It can be divided in two parts, 43996846 and 44, that added together give a triangular number (43996890 = T₉₃₈₀).

The spelling of 4399684644 in words is "four billion, three hundred ninety-nine million, six hundred eighty-four thousand, six hundred forty-four".