19189140 has 24 divisors (see below), whose sum is σ = 53729760. Its totient is φ = 5117088.

The previous prime is 19189139. The next prime is 19189147. The reversal of 19189140 is 4198191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19189147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159850 + ... + 159969.

It is an arithmetic number, because the mean of its divisors is an integer number (2238740).

Almost surely, 2^19189140 is an apocalyptic number.

19189140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19189140 is an abundant number, since it is smaller than the sum of its proper divisors (34540620).

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

19189140 is a wasteful number, since it uses less digits than its factorization.

19189140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319831 (or 319829 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 19189140 is about 4380.5410624716. The cubic root of 19189140 is about 267.7226841094.

The spelling of 19189140 in words is "nineteen million, one hundred eighty-nine thousand, one hundred forty".