1263835140 has 48 divisors (see below), whose sum is σ = 3555545280. Its totient is φ = 335422080.

The previous prime is 1263835081. The next prime is 1263835193. The reversal of 1263835140 is 415383621.

It is a super-2 number, since 2×1263835140² = 3194558522197639200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37255 + ... + 62574.

It is an arithmetic number, because the mean of its divisors is an integer number (74073860).

Almost surely, 2^1263835140 is an apocalyptic number.

1263835140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263835140 is an abundant number, since it is smaller than the sum of its proper divisors (2291710140).

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

1263835140 is a wasteful number, since it uses less digits than its factorization.

1263835140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100052 (or 100050 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1263835140 is about 35550.4590687659. The cubic root of 1263835140 is about 1081.1770260929.

The spelling of 1263835140 in words is "one billion, two hundred sixty-three million, eight hundred thirty-five thousand, one hundred forty".