1643608 has 16 divisors (see below), whose sum is σ = 3157560. Its totient is φ = 801600.

The previous prime is 1643599. The next prime is 1643617. The reversal of 1643608 is 8063461.

It is an interprime number because it is at equal distance from previous prime (1643599) and next prime (1643617).

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, 2178 + ... + 2833.

2^1643608 is an apocalyptic number.

It is an amenable number.

1643608 is a deficient number, since it is larger than the sum of its proper divisors (1513952).

1643608 is a wasteful number, since it uses less digits than its factorization.

1643608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5058 (or 5054 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1643608 is about 1282.0327608919. The cubic root of 1643608 is about 118.0137875300.

The spelling of 1643608 in words is "one million, six hundred forty-three thousand, six hundred eight".