719640 has 48 divisors (see below), whose sum is σ = 2340000. Its totient is φ = 191808.

The previous prime is 719639. The next prime is 719659. The reversal of 719640 is 46917.

719640 is a `hidden beast` number, since 7 + 19 + 640 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 640 + ... + 1359.

It is an arithmetic number, because the mean of its divisors is an integer number (48750).

2⁷¹⁹⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

719640 is an abundant number, since it is smaller than the sum of its proper divisors (1620360).

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

719640 is a wasteful number, since it uses less digits than its factorization.

719640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 719640 is about 848.3159788664. The cubic root of 719640 is about 89.6131544250.

The spelling of 719640 in words is "seven hundred nineteen thousand, six hundred forty".