1263968990 has 16 divisors (see below), whose sum is σ = 2275624800. Its totient is φ = 505480800.

The previous prime is 1263968971. The next prime is 1263969013. The reversal of 1263968990 is 998693621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51236 + ... + 71784.

It is an arithmetic number, because the mean of its divisors is an integer number (142226550).

Almost surely, 2^1263968990 is an apocalyptic number.

1263968990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1263968990 is a deficient number, since it is larger than the sum of its proper divisors (1011655810).

1263968990 is a wasteful number, since it uses less digits than its factorization.

1263968990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26707.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The square root of 1263968990 is about 35552.3415543899. The cubic root of 1263968990 is about 1081.2151931059.

The spelling of 1263968990 in words is "one billion, two hundred sixty-three million, nine hundred sixty-eight thousand, nine hundred ninety".