628267812 has 12 divisors (see below), whose sum is σ = 1465958256. Its totient is φ = 209422600.

The previous prime is 628267811. The next prime is 628267819. The reversal of 628267812 is 218762826.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (628267811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26177814 + ... + 26177837.

It is an arithmetic number, because the mean of its divisors is an integer number (122163188).

Almost surely, 2^628267812 is an apocalyptic number.

It is an amenable number.

628267812 is an abundant number, since it is smaller than the sum of its proper divisors (837690444).

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

628267812 is a wasteful number, since it uses less digits than its factorization.

628267812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52355658 (or 52355656 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 628267812 is about 25065.2710338428. The cubic root of 628267812 is about 856.4754851694.

The spelling of 628267812 in words is "six hundred twenty-eight million, two hundred sixty-seven thousand, eight hundred twelve".