720282640 has 80 divisors (see below), whose sum is σ = 2087902080. Its totient is φ = 224501760.

The previous prime is 720282623. The next prime is 720282649. The reversal of 720282640 is 46282027.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (720282649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52305 + ... + 64624.

It is an arithmetic number, because the mean of its divisors is an integer number (26098776).

Almost surely, 2^720282640 is an apocalyptic number.

720282640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

720282640 is an abundant number, since it is smaller than the sum of its proper divisors (1367619440).

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

720282640 is a wasteful number, since it uses less digits than its factorization.

720282640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116960 (or 116954 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 720282640 is about 26838.0818986752. The cubic root of 720282640 is about 896.3982139905.

The spelling of 720282640 in words is "seven hundred twenty million, two hundred eighty-two thousand, six hundred forty".