1280957760 has 224 divisors, whose sum is σ = 4642225920. Its totient is φ = 332273664.

The previous prime is 1280957737. The next prime is 1280957761. The reversal of 1280957760 is 677590821.

1280957760 is a `hidden beast` number, since 12 + 8 + 0 + 9 + 577 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280957761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 317677 + ... + 321683.

Almost surely, 2^1280957760 is an apocalyptic number.

1280957760 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 1280957760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2321112960).

1280957760 is an abundant number, since it is smaller than the sum of its proper divisors (3361268160).

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

1280957760 is a wasteful number, since it uses less digits than its factorization.

1280957760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070 (or 4054 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 1280957760 is about 35790.4702399955. The cubic root of 1280957760 is about 1086.0377875194.

The spelling of 1280957760 in words is "one billion, two hundred eighty million, nine hundred fifty-seven thousand, seven hundred sixty".