1388222242 has 8 divisors (see below), whose sum is σ = 2271636432. Its totient is φ = 631010100.

The previous prime is 1388222177. The next prime is 1388222243. The reversal of 1388222242 is 2422228831.

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 = 1388222198 and 1388222207.

It is not an unprimeable number, because it can be changed into a prime (1388222243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31550484 + ... + 31550527.

It is an arithmetic number, because the mean of its divisors is an integer number (283954554).

Almost surely, 2^1388222242 is an apocalyptic number.

1388222242 is a deficient number, since it is larger than the sum of its proper divisors (883414190).

1388222242 is a wasteful number, since it uses less digits than its factorization.

1388222242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63101024.

The product of its digits is 24576, while the sum is 34.

The square root of 1388222242 is about 37258.8545449266. The cubic root of 1388222242 is about 1115.5430447445.

The spelling of 1388222242 in words is "one billion, three hundred eighty-eight million, two hundred twenty-two thousand, two hundred forty-two".