1996720 has 40 divisors (see below), whose sum is σ = 5066640. Its totient is φ = 725760.

The previous prime is 1996717. The next prime is 1996721. The reversal of 1996720 is 276991.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1996721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255 + ... + 2014.

It is an arithmetic number, because the mean of its divisors is an integer number (126666).

2^1996720 is an apocalyptic number.

1996720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1996720 is an abundant number, since it is smaller than the sum of its proper divisors (3069920).

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

1996720 is a wasteful number, since it uses less digits than its factorization.

1996720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293 (or 2287 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 1996720 is about 1413.0534314031. The cubic root of 1996720 is about 125.9231916190.

The spelling of 1996720 in words is "one million, nine hundred ninety-six thousand, seven hundred twenty".