1288883787 has 8 divisors (see below), whose sum is σ = 1719837840. Its totient is φ = 858592800.

The previous prime is 1288883779. The next prime is 1288883809. The reversal of 1288883787 is 7873888821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1288883787 - 2³ = 1288883779 is a prime.

It is a super-2 number, since 2×1288883787² = 3322442832782922738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1288883787.

It is not an unprimeable number, because it can be changed into a prime (1288883707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161212 + ... + 169017.

It is an arithmetic number, because the mean of its divisors is an integer number (214979730).

Almost surely, 2^1288883787 is an apocalyptic number.

1288883787 is a deficient number, since it is larger than the sum of its proper divisors (430954053).

1288883787 is a wasteful number, since it uses less digits than its factorization.

1288883787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331533.

The product of its digits is 9633792, while the sum is 60.

The square root of 1288883787 is about 35901.0276593860. The cubic root of 1288883787 is about 1088.2731647561.

The spelling of 1288883787 in words is "one billion, two hundred eighty-eight million, eight hundred eighty-three thousand, seven hundred eighty-seven".