1263428632 has 8 divisors (see below), whose sum is σ = 2368928700. Its totient is φ = 631714312.

The previous prime is 1263428629. The next prime is 1263428633. The reversal of 1263428632 is 2368243621.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1263428591 and 1263428600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263428633) 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 as a sum of consecutive naturals, namely, 78964282 + ... + 78964297.

Almost surely, 2^1263428632 is an apocalyptic number.

It is an amenable number.

1263428632 is a deficient number, since it is larger than the sum of its proper divisors (1105500068).

1263428632 is a wasteful number, since it uses less digits than its factorization.

1263428632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157928585 (or 157928581 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 1263428632 is about 35544.7412706859. The cubic root of 1263428632 is about 1081.0610947696.

The spelling of 1263428632 in words is "one billion, two hundred sixty-three million, four hundred twenty-eight thousand, six hundred thirty-two".