1263841328 has 20 divisors (see below), whose sum is σ = 2451357240. Its totient is φ = 631233024.

The previous prime is 1263841309. The next prime is 1263841333. The reversal of 1263841328 is 8231483621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1263841291 and 1263841300.

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, 27650 + ... + 57377.

It is an arithmetic number, because the mean of its divisors is an integer number (122567862).

Almost surely, 2^1263841328 is an apocalyptic number.

It is an amenable number.

1263841328 is a deficient number, since it is larger than the sum of its proper divisors (1187515912).

1263841328 is an equidigital number, since it uses as much as digits as its factorization.

1263841328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85964 (or 85958 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 1263841328 is about 35550.5460998843. The cubic root of 1263841328 is about 1081.1787906460.

The spelling of 1263841328 in words is "one billion, two hundred sixty-three million, eight hundred forty-one thousand, three hundred twenty-eight".