6400616 has 8 divisors (see below), whose sum is σ = 12001170. Its totient is φ = 3200304.

The previous prime is 6400607. The next prime is 6400621. The reversal of 6400616 is 6160046.

It can be written as a sum of positive squares in only one way, i.e., 3407716 + 2992900 = 1846^2 + 1730^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 6400591 and 6400600.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400031 + ... + 400046.

Almost surely, 2^6400616 is an apocalyptic number.

It is an amenable number.

6400616 is a deficient number, since it is larger than the sum of its proper divisors (5600554).

6400616 is a wasteful number, since it uses less digits than its factorization.

6400616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800083 (or 800079 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 6400616 is about 2529.9438728952. The cubic root of 6400616 is about 185.6695098591.

The spelling of 6400616 in words is "six million, four hundred thousand, six hundred sixteen".