1999408 has 20 divisors (see below), whose sum is σ = 4078360. Its totient is φ = 946944.

The previous prime is 1999379. The next prime is 1999423. The reversal of 1999408 is 8049991.

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, 2985 + ... + 3592.

It is an arithmetic number, because the mean of its divisors is an integer number (203918).

2^1999408 is an apocalyptic number.

It is an amenable number.

1999408 is an abundant number, since it is smaller than the sum of its proper divisors (2078952).

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

1999408 is a wasteful number, since it uses less digits than its factorization.

1999408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6604 (or 6598 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 1999408 is about 1414.0042432751. The cubic root of 1999408 is about 125.9796725417.

The spelling of 1999408 in words is "one million, nine hundred ninety-nine thousand, four hundred eight".