1280652984 has 128 divisors (see below), whose sum is σ = 3860136000. Its totient is φ = 391053312.

The previous prime is 1280652983. The next prime is 1280653001. The reversal of 1280652984 is 4892560821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280652983) 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, 383032 + ... + 386360.

Almost surely, 2^1280652984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280652984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1930068000).

1280652984 is an abundant number, since it is smaller than the sum of its proper divisors (2579483016).

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

1280652984 is a wasteful number, since it uses less digits than its factorization.

1280652984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3494 (or 3484 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 1280652984 is about 35786.2122052614. The cubic root of 1280652984 is about 1085.9516476748.

The spelling of 1280652984 in words is "one billion, two hundred eighty million, six hundred fifty-two thousand, nine hundred eighty-four".