747907812 has 18 divisors (see below), whose sum is σ = 1890544838. Its totient is φ = 249302592.

The previous prime is 747907781. The next prime is 747907819. The reversal of 747907812 is 218709747.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 553472676 + 194435136 = 23526^2 + 13944^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (747907819) 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 5 ways as a sum of consecutive naturals, for example, 10387573 + ... + 10387644.

Almost surely, 2^747907812 is an apocalyptic number.

It is an amenable number.

747907812 is an abundant number, since it is smaller than the sum of its proper divisors (1142637026).

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

747907812 is a wasteful number, since it uses less digits than its factorization.

747907812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20775227 (or 20775222 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 747907812 is about 27347.9032468670. The cubic root of 747907812 is about 907.7146745282.

The spelling of 747907812 in words is "seven hundred forty-seven million, nine hundred seven thousand, eight hundred twelve".