1287639096 has 16 divisors (see below), whose sum is σ = 3219097800. Its totient is φ = 429213024.

The previous prime is 1287639079. The next prime is 1287639097. The reversal of 1287639096 is 6909367821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287639097) 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, 26825791 + ... + 26825838.

Almost surely, 2^1287639096 is an apocalyptic number.

It is an amenable number.

1287639096 is an abundant number, since it is smaller than the sum of its proper divisors (1931458704).

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

1287639096 is a wasteful number, since it uses less digits than its factorization.

1287639096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53651638 (or 53651634 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 1287639096 is about 35883.6884391780. The cubic root of 1287639096 is about 1087.9227323119.

The spelling of 1287639096 in words is "one billion, two hundred eighty-seven million, six hundred thirty-nine thousand, ninety-six".