720372631 has 16 divisors (see below), whose sum is σ = 829612800. Its totient is φ = 618624000.

The previous prime is 720372617. The next prime is 720372641. The reversal of 720372631 is 136273027.

It is a cyclic number.

It is not a de Polignac number, because 720372631 - 2⁷ = 720372503 is a prime.

It is a super-2 number, since 2×720372631² = 1037873454987724322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 720372593 and 720372602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720372641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70231 + ... + 79831.

It is an arithmetic number, because the mean of its divisors is an integer number (51850800).

Almost surely, 2^720372631 is an apocalyptic number.

720372631 is a deficient number, since it is larger than the sum of its proper divisors (109240169).

720372631 is a wasteful number, since it uses less digits than its factorization.

720372631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9990.

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 720372631 is about 26839.7584005520. The cubic root of 720372631 is about 896.4355439717.

The spelling of 720372631 in words is "seven hundred twenty million, three hundred seventy-two thousand, six hundred thirty-one".