1999960 has 16 divisors (see below), whose sum is σ = 4500000. Its totient is φ = 799968.

The previous prime is 1999957. The next prime is 1999969. The reversal of 1999960 is 699991.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24960 + ... + 25039.

It is an arithmetic number, because the mean of its divisors is an integer number (281250).

2^1999960 is an apocalyptic number.

1999960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1999960 is an abundant number, since it is smaller than the sum of its proper divisors (2500040).

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

1999960 is a wasteful number, since it uses less digits than its factorization.

1999960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50010 (or 50006 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 43.

The square root of 1999960 is about 1414.1994201668. The cubic root of 1999960 is about 125.9912650365.

The spelling of 1999960 in words is "one million, nine hundred ninety-nine thousand, nine hundred sixty".