747296640 has 192 divisors, whose sum is σ = 2602089360. Its totient is φ = 197615616.

The previous prime is 747296639. The next prime is 747296647. The reversal of 747296640 is 46692747.

It is a tau number, because it is divible by the number of its divisors (192).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747296647) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 788647 + ... + 789593.

Almost surely, 2^747296640 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 747296640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1301044680).

747296640 is an abundant number, since it is smaller than the sum of its proper divisors (1854792720).

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

747296640 is a wasteful number, since it uses less digits than its factorization.

747296640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109 (or 1094 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 747296640 is about 27336.7269438022. The cubic root of 747296640 is about 907.4673530591.

The spelling of 747296640 in words is "seven hundred forty-seven million, two hundred ninety-six thousand, six hundred forty".