1280072160 has 240 divisors, whose sum is σ = 4624660656. Its totient is φ = 333268992.

The previous prime is 1280072141. The next prime is 1280072173. The reversal of 1280072160 is 612700821.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 556132 + ... + 558428.

Almost surely, 2^1280072160 is an apocalyptic number.

1280072160 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 1280072160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2312330328).

1280072160 is an abundant number, since it is smaller than the sum of its proper divisors (3344588496).

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

1280072160 is a wasteful number, since it uses less digits than its factorization.

1280072160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2367 (or 2350 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1280072160 is about 35778.0960924418. The cubic root of 1280072160 is about 1085.7874496270.

Adding to 1280072160 its reverse (612700821), we get a palindrome (1892772981).

The spelling of 1280072160 in words is "one billion, two hundred eighty million, seventy-two thousand, one hundred sixty".