1280172032 has 84 divisors (see below), whose sum is σ = 2680520928. Its totient is φ = 610713600.

The previous prime is 1280171999. The next prime is 1280172043. The reversal of 1280172032 is 2302710821.

It is a junction number, because it is equal to n+sod(n) for n = 1280171992 and 1280172010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18030557 + ... + 18030627.

Almost surely, 2^1280172032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280172032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1340260464).

1280172032 is an abundant number, since it is smaller than the sum of its proper divisors (1400348896).

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

1280172032 is an frugal number, since it uses more digits than its factorization.

1280172032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1280172032 is about 35779.4917795097. The cubic root of 1280172032 is about 1085.8156868226.

Adding to 1280172032 its reverse (2302710821), we get a palindrome (3582882853).

The spelling of 1280172032 in words is "one billion, two hundred eighty million, one hundred seventy-two thousand, thirty-two".