1280657160 has 48 divisors (see below), whose sum is σ = 4162136940. Its totient is φ = 341508480.

The previous prime is 1280657153. The next prime is 1280657167. The reversal of 1280657160 is 617560821.

1280657160 is a `hidden beast` number, since 1 + 2 + 80 + 6 + 571 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1280657153) and next prime (1280657167).

It can be written as a sum of positive squares in 2 ways, for example, as 1267217604 + 13439556 = 35598^2 + 3666^2 .

It is a super-2 number, since 2×1280657160² = 3280165522918531200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1280657167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1778331 + ... + 1779050.

Almost surely, 2^1280657160 is an apocalyptic number.

1280657160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280657160 is an abundant number, since it is smaller than the sum of its proper divisors (2881479780).

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

1280657160 is a wasteful number, since it uses less digits than its factorization.

1280657160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3557398 (or 3557391 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 1280657160 is about 35786.2705517074. The cubic root of 1280657160 is about 1085.9528280437.

The spelling of 1280657160 in words is "one billion, two hundred eighty million, six hundred fifty-seven thousand, one hundred sixty".