1263884388 has 24 divisors (see below), whose sum is σ = 3175915008. Its totient is φ = 388887456.

The previous prime is 1263884359. The next prime is 1263884441. The reversal of 1263884388 is 8834883621.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1263884388.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4050756 + ... + 4051067.

It is an arithmetic number, because the mean of its divisors is an integer number (132329792).

Almost surely, 2^1263884388 is an apocalyptic number.

It is an amenable number.

1263884388 is an abundant number, since it is smaller than the sum of its proper divisors (1912030620).

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

1263884388 is a wasteful number, since it uses less digits than its factorization.

1263884388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8101843 (or 8101841 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 51.

The square root of 1263884388 is about 35551.1517113018. The cubic root of 1263884388 is about 1081.1910693577.

The spelling of 1263884388 in words is "one billion, two hundred sixty-three million, eight hundred eighty-four thousand, three hundred eighty-eight".