1720742344 has 16 divisors (see below), whose sum is σ = 3229164720. Its totient is φ = 859631760.

The previous prime is 1720742341. The next prime is 1720742369. The reversal of 1720742344 is 4432470271.

It is a super-2 number, since 2×1720742344² = 5921908428869228672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1720742341) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 82474 + ... + 101209.

It is an arithmetic number, because the mean of its divisors is an integer number (201822795).

Almost surely, 2^1720742344 is an apocalyptic number.

It is an amenable number.

1720742344 is a deficient number, since it is larger than the sum of its proper divisors (1508422376).

1720742344 is a wasteful number, since it uses less digits than its factorization.

1720742344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184860 (or 184856 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 34.

The square root of 1720742344 is about 41481.8314928355. The cubic root of 1720742344 is about 1198.3176294972.

The spelling of 1720742344 in words is "one billion, seven hundred twenty million, seven hundred forty-two thousand, three hundred forty-four".