720172700 has 72 divisors (see below), whose sum is σ = 1782042192. Its totient is φ = 250260480.

The previous prime is 720172697. The next prime is 720172721. The reversal of 720172700 is 7271027.

It is a super-3 number, since 3×720172700³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 720172700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5807 + ... + 38393.

It is an arithmetic number, because the mean of its divisors is an integer number (24750586).

Almost surely, 2^720172700 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720172700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (891021096).

720172700 is an abundant number, since it is smaller than the sum of its proper divisors (1061869492).

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

720172700 is a wasteful number, since it uses less digits than its factorization.

720172700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32631 (or 32624 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 26.

The square root of 720172700 is about 26836.0336115455. The cubic root of 720172700 is about 896.3526045641.

The spelling of 720172700 in words is "seven hundred twenty million, one hundred seventy-two thousand, seven hundred".