1720168400 has 60 divisors (see below), whose sum is σ = 4137681600. Its totient is φ = 687239040.

The previous prime is 1720168397. The next prime is 1720168403. The reversal of 1720168400 is 48610271.

It is an interprime number because it is at equal distance from previous prime (1720168397) and next prime (1720168403).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720168403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 413531 + ... + 417669.

It is an arithmetic number, because the mean of its divisors is an integer number (68961360).

Almost surely, 2^1720168400 is an apocalyptic number.

1720168400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1720168400 is an abundant number, since it is smaller than the sum of its proper divisors (2417513200).

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

1720168400 is a wasteful number, since it uses less digits than its factorization.

1720168400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5196 (or 5185 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1720168400 is about 41474.9128992455. The cubic root of 1720168400 is about 1198.1843839637.

Adding to 1720168400 its reverse (48610271), we get a palindrome (1768778671).

The spelling of 1720168400 in words is "one billion, seven hundred twenty million, one hundred sixty-eight thousand, four hundred".