720540128 has 48 divisors (see below), whose sum is σ = 1768604544. Its totient is φ = 280728960.

The previous prime is 720540103. The next prime is 720540137. The reversal of 720540128 is 821045027.

It is a self number, because there is not a number n which added to its sum of digits gives 720540128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143750 + ... + 148677.

It is an arithmetic number, because the mean of its divisors is an integer number (36845928).

Almost surely, 2^720540128 is an apocalyptic number.

It is an amenable number.

720540128 is an abundant number, since it is smaller than the sum of its proper divisors (1048064416).

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

720540128 is a wasteful number, since it uses less digits than its factorization.

720540128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292455 (or 292447 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 720540128 is about 26842.8785341662. The cubic root of 720540128 is about 896.5050166409.

The spelling of 720540128 in words is "seven hundred twenty million, five hundred forty thousand, one hundred twenty-eight".