720871520 has 192 divisors, whose sum is σ = 1881169920. Its totient is φ = 260198400.

The previous prime is 720871513. The next prime is 720871573. The reversal of 720871520 is 25178027.

It is a super-2 number, since 2×720871520² = 1039311496694220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8099636 + ... + 8099724.

It is an arithmetic number, because the mean of its divisors is an integer number (9797760).

Almost surely, 2^720871520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720871520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (940584960).

720871520 is an abundant number, since it is smaller than the sum of its proper divisors (1160298400).

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

720871520 is a wasteful number, since it uses less digits than its factorization.

720871520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 720871520 is about 26849.0506349852. The cubic root of 720871520 is about 896.6424362626.

The spelling of 720871520 in words is "seven hundred twenty million, eight hundred seventy-one thousand, five hundred twenty".