1720434240 has 336 divisors, whose sum is σ = 6878726400. Its totient is φ = 386519040.

The previous prime is 1720434229. The next prime is 1720434253. The reversal of 1720434240 is 424340271.

It is a tau number, because it is divible by the number of its divisors (336).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1229061 + ... + 1230459.

It is an arithmetic number, because the mean of its divisors is an integer number (20472400).

Almost surely, 2^1720434240 is an apocalyptic number.

1720434240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1720434240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3439363200).

1720434240 is an abundant number, since it is smaller than the sum of its proper divisors (5158292160).

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

1720434240 is a wasteful number, since it uses less digits than its factorization.

1720434240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490 (or 1477 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 1720434240 is about 41478.1176043465. The cubic root of 1720434240 is about 1198.2461044576.

The spelling of 1720434240 in words is "one billion, seven hundred twenty million, four hundred thirty-four thousand, two hundred forty".