1720142240 has 48 divisors (see below), whose sum is σ = 4089780072. Its totient is φ = 683664384.

The previous prime is 1720142231. The next prime is 1720142273. The reversal of 1720142240 is 422410271.

It can be written as a sum of positive squares in 4 ways, for example, as 1375223056 + 344919184 = 37084^2 + 18572^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9119 + ... + 59358.

Almost surely, 2^1720142240 is an apocalyptic number.

1720142240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1720142240 is an abundant number, since it is smaller than the sum of its proper divisors (2369637832).

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

1720142240 is a wasteful number, since it uses less digits than its factorization.

1720142240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68649 (or 68641 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 1720142240 is about 41474.5975266789. The cubic root of 1720142240 is about 1198.1783100115.

The spelling of 1720142240 in words is "one billion, seven hundred twenty million, one hundred forty-two thousand, two hundred forty".