720917030 has 16 divisors (see below), whose sum is σ = 1302241104. Its totient is φ = 287346720.

The previous prime is 720917023. The next prime is 720917039. The reversal of 720917030 is 30719027.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 720916984 and 720917002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720917039) 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, 124541 + ... + 130200.

It is an arithmetic number, because the mean of its divisors is an integer number (81390069).

Almost surely, 2^720917030 is an apocalyptic number.

720917030 is a deficient number, since it is larger than the sum of its proper divisors (581324074).

720917030 is a wasteful number, since it uses less digits than its factorization.

720917030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255031.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 720917030 is about 26849.8981376094. The cubic root of 720917030 is about 896.6613047838.

The spelling of 720917030 in words is "seven hundred twenty million, nine hundred seventeen thousand, thirty".