720445972 has 6 divisors (see below), whose sum is σ = 1260780458. Its totient is φ = 360222984.

The previous prime is 720445969. The next prime is 720446021. The reversal of 720445972 is 279544027.

It can be written as a sum of positive squares in only one way, i.e., 593117316 + 127328656 = 24354^2 + 11284^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90055743 + ... + 90055750.

Almost surely, 2^720445972 is an apocalyptic number.

It is an amenable number.

720445972 is a deficient number, since it is larger than the sum of its proper divisors (540334486).

720445972 is a wasteful number, since it uses less digits than its factorization.

720445972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180111497 (or 180111495 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 720445972 is about 26841.1246411174. The cubic root of 720445972 is about 896.4659649166.

Adding to 720445972 its reverse (279544027), we get a palindrome (999989999).

The spelling of 720445972 in words is "seven hundred twenty million, four hundred forty-five thousand, nine hundred seventy-two".