1271780352 has 264 divisors, whose sum is σ = 4023583200. Its totient is φ = 400121856.

The previous prime is 1271780351. The next prime is 1271780383. The reversal of 1271780352 is 2530871721.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271780351) 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 in 23 ways as a sum of consecutive naturals, for example, 4727674 + ... + 4727942.

Almost surely, 2^1271780352 is an apocalyptic number.

1271780352 is a gapful number since it is divisible by the number (12) 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 1271780352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2011791600).

1271780352 is an abundant number, since it is smaller than the sum of its proper divisors (2751802848).

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

1271780352 is an equidigital number, since it uses as much as digits as its factorization.

1271780352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 1271780352 is about 35662.0295552567. The cubic root of 1271780352 is about 1083.4379334005.

The spelling of 1271780352 in words is "one billion, two hundred seventy-one million, seven hundred eighty thousand, three hundred fifty-two".