1288632238 has 8 divisors (see below), whose sum is σ = 1941464232. Its totient is φ = 641477496.

The previous prime is 1288632217. The next prime is 1288632251. The reversal of 1288632238 is 8322368821.

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

It is a junction number, because it is equal to n+sod(n) for n = 1288632194 and 1288632203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1418745 + ... + 1419652.

It is an arithmetic number, because the mean of its divisors is an integer number (242683029).

Almost surely, 2^1288632238 is an apocalyptic number.

1288632238 is a deficient number, since it is larger than the sum of its proper divisors (652831994).

1288632238 is a wasteful number, since it uses less digits than its factorization.

1288632238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838626.

The product of its digits is 221184, while the sum is 43.

The square root of 1288632238 is about 35897.5241207524. The cubic root of 1288632238 is about 1088.2023614144.

The spelling of 1288632238 in words is "one billion, two hundred eighty-eight million, six hundred thirty-two thousand, two hundred thirty-eight".