1288688870 has 32 divisors (see below), whose sum is σ = 2790547200. Its totient is φ = 418581216.

The previous prime is 1288688857. The next prime is 1288688903. The reversal of 1288688870 is 788868821.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483140 + ... + 485799.

It is an arithmetic number, because the mean of its divisors is an integer number (87204600).

Almost surely, 2^1288688870 is an apocalyptic number.

1288688870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1288688870 is an abundant number, since it is smaller than the sum of its proper divisors (1501858330).

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

1288688870 is a wasteful number, since it uses less digits than its factorization.

1288688870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968972.

The product of its (nonzero) digits is 2752512, while the sum is 56.

The square root of 1288688870 is about 35898.3129130047. The cubic root of 1288688870 is about 1088.2183023921.

The spelling of 1288688870 in words is "one billion, two hundred eighty-eight million, six hundred eighty-eight thousand, eight hundred seventy".