1288877790 has 16 divisors (see below), whose sum is σ = 3093306768. Its totient is φ = 343700736.

The previous prime is 1288877771. The next prime is 1288877857. The reversal of 1288877790 is 977788821.

1288877790 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1288877790² = 3322411915110568200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1288877790.

It is a congruent number.

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, 21481267 + ... + 21481326.

It is an arithmetic number, because the mean of its divisors is an integer number (193331673).

Almost surely, 2^1288877790 is an apocalyptic number.

1288877790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1288877790 is an abundant number, since it is smaller than the sum of its proper divisors (1804428978).

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

1288877790 is a wasteful number, since it uses less digits than its factorization.

1288877790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42962603.

The product of its (nonzero) digits is 3161088, while the sum is 57.

The square root of 1288877790 is about 35900.9441380028. The cubic root of 1288877790 is about 1088.2714768914.

The spelling of 1288877790 in words is "one billion, two hundred eighty-eight million, eight hundred seventy-seven thousand, seven hundred ninety".