19448140 has 12 divisors (see below), whose sum is σ = 40841136. Its totient is φ = 7779248.

The previous prime is 19448137. The next prime is 19448161. The reversal of 19448140 is 4184491.

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, 486184 + ... + 486223.

It is an arithmetic number, because the mean of its divisors is an integer number (3403428).

Almost surely, 2^19448140 is an apocalyptic number.

19448140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19448140 is an abundant number, since it is smaller than the sum of its proper divisors (21392996).

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

19448140 is a wasteful number, since it uses less digits than its factorization.

19448140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972416 (or 972414 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 19448140 is about 4410.0045351451. The cubic root of 19448140 is about 268.9218090160.

The spelling of 19448140 in words is "nineteen million, four hundred forty-eight thousand, one hundred forty".