1264485188 has 12 divisors (see below), whose sum is σ = 2329314960. Its totient is φ = 598966632.

The previous prime is 1264485149. The next prime is 1264485197. The reversal of 1264485188 is 8815844621.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8318906 + ... + 8319057.

It is an arithmetic number, because the mean of its divisors is an integer number (194109580).

Almost surely, 2^1264485188 is an apocalyptic number.

It is an amenable number.

1264485188 is a deficient number, since it is larger than the sum of its proper divisors (1064829772).

1264485188 is a wasteful number, since it uses less digits than its factorization.

1264485188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16637986 (or 16637984 counting only the distinct ones).

The product of its digits is 491520, while the sum is 47.

The square root of 1264485188 is about 35559.6005039427. The cubic root of 1264485188 is about 1081.3623605243.

The spelling of 1264485188 in words is "one billion, two hundred sixty-four million, four hundred eighty-five thousand, one hundred eighty-eight".