1720969836 has 48 divisors (see below), whose sum is σ = 4149089280. Its totient is φ = 554621760.

The previous prime is 1720969819. The next prime is 1720969841. The reversal of 1720969836 is 6389690271.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 634395 + ... + 637101.

It is an arithmetic number, because the mean of its divisors is an integer number (86439360).

Almost surely, 2^1720969836 is an apocalyptic number.

It is an amenable number.

1720969836 is an abundant number, since it is smaller than the sum of its proper divisors (2428119444).

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

1720969836 is a wasteful number, since it uses less digits than its factorization.

1720969836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454 (or 4452 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 1720969836 is about 41484.5734701467. The cubic root of 1720969836 is about 1198.3704353230.

The spelling of 1720969836 in words is "one billion, seven hundred twenty million, nine hundred sixty-nine thousand, eight hundred thirty-six".