720346140 has 72 divisors (see below), whose sum is σ = 2206739808. Its totient is φ = 190185600.

The previous prime is 720346129. The next prime is 720346171. The reversal of 720346140 is 41643027.

It is a super-2 number, since 2×720346140² = 1037797122825799200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1632 + ... + 37991.

It is an arithmetic number, because the mean of its divisors is an integer number (30649164).

Almost surely, 2^720346140 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 720346140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1103369904).

720346140 is an abundant number, since it is smaller than the sum of its proper divisors (1486393668).

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

720346140 is a wasteful number, since it uses less digits than its factorization.

720346140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39739 (or 39734 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 720346140 is about 26839.2648930629. The cubic root of 720346140 is about 896.4245553232.

Adding to 720346140 its reverse (41643027), we get a palindrome (761989167).

The spelling of 720346140 in words is "seven hundred twenty million, three hundred forty-six thousand, one hundred forty".