747722880 has 128 divisors (see below), whose sum is σ = 2648246400. Its totient is φ = 199388160.

The previous prime is 747722873. The next prime is 747722923. The reversal of 747722880 is 88227747.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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 15 ways as a sum of consecutive naturals, for example, 4356 + ... + 38915.

It is an arithmetic number, because the mean of its divisors is an integer number (20689425).

Almost surely, 2^747722880 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 747722880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1324123200).

747722880 is an abundant number, since it is smaller than the sum of its proper divisors (1900523520).

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

747722880 is a wasteful number, since it uses less digits than its factorization.

747722880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43299 (or 43281 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The square root of 747722880 is about 27344.5219376752. The cubic root of 747722880 is about 907.6398527720.

The spelling of 747722880 in words is "seven hundred forty-seven million, seven hundred twenty-two thousand, eight hundred eighty".