1288781214 has 16 divisors (see below), whose sum is σ = 2945785728. Its totient is φ = 368223192.

The previous prime is 1288781213. The next prime is 1288781233. The reversal of 1288781214 is 4121878821.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 30685267 = 1288781214 / (1 + 2 + 8 + 8 + 7 + 8 + 1 + 2 + 1 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288781213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15342592 + ... + 15342675.

It is an arithmetic number, because the mean of its divisors is an integer number (184111608).

Almost surely, 2^1288781214 is an apocalyptic number.

1288781214 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1288781214 is an abundant number, since it is smaller than the sum of its proper divisors (1657004514).

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

1288781214 is a wasteful number, since it uses less digits than its factorization.

1288781214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30685279.

The product of its digits is 57344, while the sum is 42.

The square root of 1288781214 is about 35899.5990785413. The cubic root of 1288781214 is about 1088.2442947096.

The spelling of 1288781214 in words is "one billion, two hundred eighty-eight million, seven hundred eighty-one thousand, two hundred fourteen".