19488138 has 8 divisors (see below), whose sum is σ = 38976288. Its totient is φ = 6496044.

The previous prime is 19488121. The next prime is 19488143. The reversal of 19488138 is 83188491.

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

19488138 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 19488138.

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, 1624006 + ... + 1624017.

It is an arithmetic number, because the mean of its divisors is an integer number (4872036).

Almost surely, 2^19488138 is an apocalyptic number.

19488138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19488138 is a wasteful number, since it uses less digits than its factorization.

19488138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3248028.

The product of its digits is 55296, while the sum is 42.

The square root of 19488138 is about 4414.5371218283. The cubic root of 19488138 is about 269.1060420400.

The spelling of 19488138 in words is "nineteen million, four hundred eighty-eight thousand, one hundred thirty-eight".