720507632 has 40 divisors (see below), whose sum is σ = 1512132384. Its totient is φ = 330603264.

The previous prime is 720507631. The next prime is 720507647. The reversal of 720507632 is 236705027.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720507631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25973 + ... + 45995.

Almost surely, 2^720507632 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 720507632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (756066192).

720507632 is an abundant number, since it is smaller than the sum of its proper divisors (791624752).

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

720507632 is a wasteful number, since it uses less digits than its factorization.

720507632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20217 (or 20211 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 720507632 is about 26842.2732271319. The cubic root of 720507632 is about 896.4915391288.

The spelling of 720507632 in words is "seven hundred twenty million, five hundred seven thousand, six hundred thirty-two".