1280901864 has 32 divisors (see below), whose sum is σ = 3493369440. Its totient is φ = 388152000.

The previous prime is 1280901833. The next prime is 1280901871. The reversal of 1280901864 is 4681090821.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2425687 + ... + 2426214.

It is an arithmetic number, because the mean of its divisors is an integer number (109167795).

Almost surely, 2^1280901864 is an apocalyptic number.

It is an amenable number.

1280901864 is an abundant number, since it is smaller than the sum of its proper divisors (2212467576).

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

1280901864 is a wasteful number, since it uses less digits than its factorization.

1280901864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4851921 (or 4851917 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 1280901864 is about 35789.6893532202. The cubic root of 1280901864 is about 1086.0219904721.

The spelling of 1280901864 in words is "one billion, two hundred eighty million, nine hundred one thousand, eight hundred sixty-four".