719988 has 12 divisors (see below), whose sum is σ = 1680000. Its totient is φ = 239992.

The previous prime is 719981. The next prime is 719989. The reversal of 719988 is 889917.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 719988.

It is not an unprimeable number, because it can be changed into a prime (719981) 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, 29988 + ... + 30011.

It is an arithmetic number, because the mean of its divisors is an integer number (140000).

2⁷¹⁹⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

719988 is an abundant number, since it is smaller than the sum of its proper divisors (960012).

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

719988 is a wasteful number, since it uses less digits than its factorization.

719988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60006 (or 60004 counting only the distinct ones).

The product of its digits is 36288, while the sum is 42.

The square root of 719988 is about 848.5210663266. The cubic root of 719988 is about 89.6275969945.

The spelling of 719988 in words is "seven hundred nineteen thousand, nine hundred eighty-eight".