747471780 has 384 divisors, whose sum is σ = 2757888000. Its totient is φ = 166095360.

The previous prime is 747471749. The next prime is 747471787. The reversal of 747471780 is 87174747.

It is a happy number.

747471780 is a `hidden beast` number, since 7 + 474 + 7 + 178 + 0 = 666.

747471780 is a nontrivial binomial coefficient, being equal to C(38665, 2).

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

It is not an unprimeable number, because it can be changed into a prime (747471787) 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 127 ways as a sum of consecutive naturals, for example, 4175731 + ... + 4175909.

It is an arithmetic number, because the mean of its divisors is an integer number (7182000).

Almost surely, 2^747471780 is an apocalyptic number.

747471780 is the 38664-th triangular number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 747471780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1378944000).

747471780 is an abundant number, since it is smaller than the sum of its proper divisors (2010416220).

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

747471780 is a wasteful number, since it uses less digits than its factorization.

747471780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 307328, while the sum is 45.

The square root of 747471780 is about 27339.9301389012. The cubic root of 747471780 is about 907.5382403120.

The spelling of 747471780 in words is "seven hundred forty-seven million, four hundred seventy-one thousand, seven hundred eighty".