726077780 has 48 divisors (see below), whose sum is σ = 1608768000. Its totient is φ = 274502016.

The previous prime is 726077767. The next prime is 726077791. The reversal of 726077780 is 87770627.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180026 + ... + 184014.

It is an arithmetic number, because the mean of its divisors is an integer number (33516000).

Almost surely, 2^726077780 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 726077780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804384000).

726077780 is an abundant number, since it is smaller than the sum of its proper divisors (882690220).

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

726077780 is a wasteful number, since it uses less digits than its factorization.

726077780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4496 (or 4494 counting only the distinct ones).

The product of its (nonzero) digits is 230496, while the sum is 44.

The square root of 726077780 is about 26945.8304752331. The cubic root of 726077780 is about 898.7958299082.

The spelling of 726077780 in words is "seven hundred twenty-six million, seventy-seven thousand, seven hundred eighty".