718784820 has 384 divisors, whose sum is σ = 2692569600. Its totient is φ = 157261824.

The previous prime is 718784809. The next prime is 718784851. The reversal of 718784820 is 28487817.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2267302 + ... + 2267618.

It is an arithmetic number, because the mean of its divisors is an integer number (7011900).

Almost surely, 2^718784820 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 718784820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1346284800).

718784820 is an abundant number, since it is smaller than the sum of its proper divisors (1973784780).

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

718784820 is a wasteful number, since it uses less digits than its factorization.

718784820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The square root of 718784820 is about 26810.1626253926. The cubic root of 718784820 is about 895.7764326482.

The spelling of 718784820 in words is "seven hundred eighteen million, seven hundred eighty-four thousand, eight hundred twenty".