720640024 has 32 divisors (see below), whose sum is σ = 1505322000. Its totient is φ = 321132672.

The previous prime is 720640021. The next prime is 720640027. The reversal of 720640024 is 420046027.

It is an interprime number because it is at equal distance from previous prime (720640021) and next prime (720640027).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720640021) 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, 116454 + ... + 122485.

Almost surely, 2^720640024 is an apocalyptic number.

It is an amenable number.

720640024 is an abundant number, since it is smaller than the sum of its proper divisors (784681976).

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

720640024 is a wasteful number, since it uses less digits than its factorization.

720640024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238987 (or 238983 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 720640024 is about 26844.7392239150. The cubic root of 720640024 is about 896.5464453429.

The spelling of 720640024 in words is "seven hundred twenty million, six hundred forty thousand, twenty-four".