720537140 has 12 divisors (see below), whose sum is σ = 1513128036. Its totient is φ = 288214848.

The previous prime is 720537107. The next prime is 720537143. The reversal of 720537140 is 41735027.

It can be written as a sum of positive squares in 2 ways, for example, as 292957456 + 427579684 = 17116^2 + 20678^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720537143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18013409 + ... + 18013448.

It is an arithmetic number, because the mean of its divisors is an integer number (126094003).

Almost surely, 2^720537140 is an apocalyptic number.

It is an amenable number.

720537140 is an abundant number, since it is smaller than the sum of its proper divisors (792590896).

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

720537140 is a wasteful number, since it uses less digits than its factorization.

720537140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36026866 (or 36026864 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 720537140 is about 26842.8228768883. The cubic root of 720537140 is about 896.5037774036.

The spelling of 720537140 in words is "seven hundred twenty million, five hundred thirty-seven thousand, one hundred forty".