1720442234 has 12 divisors (see below), whose sum is σ = 3001996314. Its totient is φ = 737332344.

The previous prime is 1720442233. The next prime is 1720442239. The reversal of 1720442234 is 4322440271.

It can be written as a sum of positive squares in only one way, i.e., 1057225225 + 663217009 = 32515^2 + 25753^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1720442197 and 1720442206.

It is not an unprimeable number, because it can be changed into a prime (1720442233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8777669 + ... + 8777864.

Almost surely, 2^1720442234 is an apocalyptic number.

1720442234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1720442234 is a deficient number, since it is larger than the sum of its proper divisors (1281554080).

1720442234 is a wasteful number, since it uses less digits than its factorization.

1720442234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17555549 (or 17555542 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 1720442234 is about 41478.2139682991. The cubic root of 1720442234 is about 1198.2479603388.

The spelling of 1720442234 in words is "one billion, seven hundred twenty million, four hundred forty-two thousand, two hundred thirty-four".