1729116720 has 100 divisors (see below), whose sum is σ = 6005501040. Its totient is φ = 461096064.

The previous prime is 1729116709. The next prime is 1729116721. The reversal of 1729116720 is 276119271.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1729116721) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 126940 + ... + 139899.

Almost surely, 2^1729116720 is an apocalyptic number.

1729116720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1729116720 is an abundant number, since it is smaller than the sum of its proper divisors (4276384320).

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

1729116720 is a wasteful number, since it uses less digits than its factorization.

1729116720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266864 (or 266849 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 1729116720 is about 41582.6492662505. The cubic root of 1729116720 is about 1200.2584443348.

The spelling of 1729116720 in words is "one billion, seven hundred twenty-nine million, one hundred sixteen thousand, seven hundred twenty".