1287822680 has 16 divisors (see below), whose sum is σ = 2897601120. Its totient is φ = 515129056.

The previous prime is 1287822661. The next prime is 1287822689. The reversal of 1287822680 is 862287821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287822689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16097744 + ... + 16097823.

It is an arithmetic number, because the mean of its divisors is an integer number (181100070).

Almost surely, 2^1287822680 is an apocalyptic number.

1287822680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1287822680 is an abundant number, since it is smaller than the sum of its proper divisors (1609778440).

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

1287822680 is a wasteful number, since it uses less digits than its factorization.

1287822680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32195578 (or 32195574 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 44.

The square root of 1287822680 is about 35886.2463905045. The cubic root of 1287822680 is about 1087.9744330605.

The spelling of 1287822680 in words is "one billion, two hundred eighty-seven million, eight hundred twenty-two thousand, six hundred eighty".