1726721340 has 48 divisors (see below), whose sum is σ = 4836773760. Its totient is φ = 460272960.

The previous prime is 1726721333. The next prime is 1726721369. The reversal of 1726721340 is 431276271.

It is a super-2 number, since 2×1726721340² = 5963133172022791200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210231 + ... + 218289.

It is an arithmetic number, because the mean of its divisors is an integer number (100766120).

Almost surely, 2^1726721340 is an apocalyptic number.

1726721340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1726721340 is an abundant number, since it is smaller than the sum of its proper divisors (3110052420).

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

1726721340 is a wasteful number, since it uses less digits than its factorization.

1726721340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11642 (or 11640 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 1726721340 is about 41553.8366459705. The cubic root of 1726721340 is about 1199.7039408524.

The spelling of 1726721340 in words is "one billion, seven hundred twenty-six million, seven hundred twenty-one thousand, three hundred forty".