726978 has 32 divisors (see below), whose sum is σ = 1751040. Its totient is φ = 196560.

The previous prime is 726953. The next prime is 726983. The reversal of 726978 is 879627.

726978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 726978.

It is an unprimeable number.

726978 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343 + ... + 1253.

It is an arithmetic number, because the mean of its divisors is an integer number (54720).

2⁷²⁶⁹⁷⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 726978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (875520).

726978 is an abundant number, since it is smaller than the sum of its proper divisors (1024062).

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

726978 is a wasteful number, since it uses less digits than its factorization.

726978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942.

The product of its digits is 42336, while the sum is 39.

The square root of 726978 is about 852.6300487316. The cubic root of 726978 is about 89.9167130727.

The spelling of 726978 in words is "seven hundred twenty-six thousand, nine hundred seventy-eight".