19388138 has 16 divisors (see below), whose sum is σ = 36258624. Its totient is φ = 7553760.

The previous prime is 19388123. The next prime is 19388147. The reversal of 19388138 is 83188391.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19388095 and 19388104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62795 + ... + 63102.

It is an arithmetic number, because the mean of its divisors is an integer number (2266164).

Almost surely, 2^19388138 is an apocalyptic number.

19388138 is a deficient number, since it is larger than the sum of its proper divisors (16870486).

19388138 is a wasteful number, since it uses less digits than its factorization.

19388138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125917.

The product of its digits is 41472, while the sum is 41.

The square root of 19388138 is about 4403.1963390246. The cubic root of 19388138 is about 268.6449621615.

The spelling of 19388138 in words is "nineteen million, three hundred eighty-eight thousand, one hundred thirty-eight".