19138808 has 32 divisors (see below), whose sum is σ = 38917200. Its totient is φ = 8771328.

The previous prime is 19138807. The next prime is 19138843. The reversal of 19138808 is 80883191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19138807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16388 + ... + 17516.

Almost surely, 2^19138808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19138808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19458600).

19138808 is an abundant number, since it is smaller than the sum of its proper divisors (19778392).

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

19138808 is a wasteful number, since it uses less digits than its factorization.

19138808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311 (or 1307 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 19138808 is about 4374.7923379287. The cubic root of 19138808 is about 267.4884054718.

The spelling of 19138808 in words is "nineteen million, one hundred thirty-eight thousand, eight hundred eight".