1720231256 has 32 divisors (see below), whose sum is σ = 3256035840. Its totient is φ = 851977728.

The previous prime is 1720231243. The next prime is 1720231267. The reversal of 1720231256 is 6521320271.

It is a happy number.

It is a congruent number.

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, 991766 + ... + 993498.

It is an arithmetic number, because the mean of its divisors is an integer number (101751120).

Almost surely, 2^1720231256 is an apocalyptic number.

It is an amenable number.

1720231256 is a deficient number, since it is larger than the sum of its proper divisors (1535804584).

1720231256 is a wasteful number, since it uses less digits than its factorization.

1720231256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843 (or 2839 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 1720231256 is about 41475.6706516001. The cubic root of 1720231256 is about 1198.1989779148.

The spelling of 1720231256 in words is "one billion, seven hundred twenty million, two hundred thirty-one thousand, two hundred fifty-six".