1726345644 has 12 divisors (see below), whose sum is σ = 4028139864. Its totient is φ = 575448544.

The previous prime is 1726345637. The next prime is 1726345679. The reversal of 1726345644 is 4465436271.

It is a happy number.

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

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1726345596 and 1726345605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71931057 + ... + 71931080.

It is an arithmetic number, because the mean of its divisors is an integer number (335678322).

Almost surely, 2^1726345644 is an apocalyptic number.

It is an amenable number.

1726345644 is an abundant number, since it is smaller than the sum of its proper divisors (2301794220).

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

1726345644 is a wasteful number, since it uses less digits than its factorization.

1726345644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143862144 (or 143862142 counting only the distinct ones).

The product of its digits is 483840, while the sum is 42.

The square root of 1726345644 is about 41549.3158066411. The cubic root of 1726345644 is about 1199.6169249465.

The spelling of 1726345644 in words is "one billion, seven hundred twenty-six million, three hundred forty-five thousand, six hundred forty-four".