1267236480 has 128 divisors (see below), whose sum is σ = 4071905280. Its totient is φ = 335204352.

The previous prime is 1267236469. The next prime is 1267236493. The reversal of 1267236480 is 846327621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 241242 + ... + 246438.

It is an arithmetic number, because the mean of its divisors is an integer number (31811760).

Almost surely, 2^1267236480 is an apocalyptic number.

1267236480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1267236480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2035952640).

1267236480 is an abundant number, since it is smaller than the sum of its proper divisors (2804668800).

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

1267236480 is a wasteful number, since it uses less digits than its factorization.

1267236480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5346 (or 5334 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 1267236480 is about 35598.2651262670. The cubic root of 1267236480 is about 1082.1460756288.

The spelling of 1267236480 in words is "one billion, two hundred sixty-seven million, two hundred thirty-six thousand, four hundred eighty".