720505104 has 80 divisors (see below), whose sum is σ = 2034018624. Its totient is φ = 217958400.

The previous prime is 720505103. The next prime is 720505111. The reversal of 720505104 is 401505027.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (720505103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 544764 + ... + 546084.

Almost surely, 2^720505104 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 720505104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1017009312).

720505104 is an abundant number, since it is smaller than the sum of its proper divisors (1313513520).

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

720505104 is a wasteful number, since it uses less digits than its factorization.

720505104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376 (or 2370 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 720505104 is about 26842.2261371891. The cubic root of 720505104 is about 896.4904906397.

The spelling of 720505104 in words is "seven hundred twenty million, five hundred five thousand, one hundred four".