1288213238 has 32 divisors (see below), whose sum is σ = 2149428960. Its totient is φ = 575182080.

The previous prime is 1288213231. The next prime is 1288213247. The reversal of 1288213238 is 8323128821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288213231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168458 + ... + 175938.

It is an arithmetic number, because the mean of its divisors is an integer number (67169655).

Almost surely, 2^1288213238 is an apocalyptic number.

1288213238 is a deficient number, since it is larger than the sum of its proper divisors (861215722).

1288213238 is a wasteful number, since it uses less digits than its factorization.

1288213238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7712.

The product of its digits is 36864, while the sum is 38.

The square root of 1288213238 is about 35891.6875891898. The cubic root of 1288213238 is about 1088.0844052841.

The spelling of 1288213238 in words is "one billion, two hundred eighty-eight million, two hundred thirteen thousand, two hundred thirty-eight".