4399816 has 8 divisors (see below), whose sum is σ = 8249670. Its totient is φ = 2199904.

The previous prime is 4399789. The next prime is 4399817. The reversal of 4399816 is 6189934.

It can be written as a sum of positive squares in only one way, i.e., 2735716 + 1664100 = 1654^2 + 1290^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (4399817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274981 + ... + 274996.

Almost surely, 2^4399816 is an apocalyptic number.

It is an amenable number.

4399816 is a deficient number, since it is larger than the sum of its proper divisors (3849854).

4399816 is a wasteful number, since it uses less digits than its factorization.

4399816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549983 (or 549979 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 4399816 is about 2097.5738366027. The cubic root of 4399816 is about 163.8619699199.

The spelling of 4399816 in words is "four million, three hundred ninety-nine thousand, eight hundred sixteen".