1720404912 has 40 divisors (see below), whose sum is σ = 4488395760. Its totient is φ = 567788800.

The previous prime is 1720404887. The next prime is 1720404919. The reversal of 1720404912 is 2194040271.

It is a super-2 number, since 2×1720404912² = 5919586122467455488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1720404912.

It is not an unprimeable number, because it can be changed into a prime (1720404919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172587 + ... + 182282.

It is an arithmetic number, because the mean of its divisors is an integer number (112209894).

Almost surely, 2^1720404912 is an apocalyptic number.

1720404912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1720404912 is an abundant number, since it is smaller than the sum of its proper divisors (2767990848).

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

1720404912 is a wasteful number, since it uses less digits than its factorization.

1720404912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354981 (or 354975 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 1720404912 is about 41477.7640670275. The cubic root of 1720404912 is about 1198.2392956414.

The spelling of 1720404912 in words is "one billion, seven hundred twenty million, four hundred four thousand, nine hundred twelve".