720836688 has 120 divisors (see below), whose sum is σ = 2204518624. Its totient is φ = 201611520.

The previous prime is 720836671. The next prime is 720836713. The reversal of 720836688 is 886638027.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70731 + ... + 80277.

Almost surely, 2^720836688 is an apocalyptic number.

720836688 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720836688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1102259312).

720836688 is an abundant number, since it is smaller than the sum of its proper divisors (1483681936).

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

720836688 is a wasteful number, since it uses less digits than its factorization.

720836688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9593 (or 9576 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 720836688 is about 26848.4019636179. The cubic root of 720836688 is about 896.6279943214.

The spelling of 720836688 in words is "seven hundred twenty million, eight hundred thirty-six thousand, six hundred eighty-eight".