1280580400 has 60 divisors (see below), whose sum is σ = 3356296344. Its totient is φ = 465664000.

The previous prime is 1280580359. The next prime is 1280580409. The reversal of 1280580400 is 40850821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280580409) 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, 141121 + ... + 149920.

Almost surely, 2^1280580400 is an apocalyptic number.

1280580400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280580400 is an abundant number, since it is smaller than the sum of its proper divisors (2075715944).

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

1280580400 is a wasteful number, since it uses less digits than its factorization.

1280580400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291070 (or 291059 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 1280580400 is about 35785.1980572974. The cubic root of 1280580400 is about 1085.9311310049.

The spelling of 1280580400 in words is "one billion, two hundred eighty million, five hundred eighty thousand, four hundred".