722786688 has 288 divisors, whose sum is σ = 2393642160. Its totient is φ = 208060416.

The previous prime is 722786683. The next prime is 722786689. The reversal of 722786688 is 886687227.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722786683) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4327981 + ... + 4328147.

Almost surely, 2^722786688 is an apocalyptic number.

722786688 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 722786688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1196821080).

722786688 is an abundant number, since it is smaller than the sum of its proper divisors (1670855472).

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

722786688 is a wasteful number, since it uses less digits than its factorization.

722786688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 202 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The square root of 722786688 is about 26884.6924475621. The cubic root of 722786688 is about 897.4357826302.

The spelling of 722786688 in words is "seven hundred twenty-two million, seven hundred eighty-six thousand, six hundred eighty-eight".