19120000 has 80 divisors (see below), whose sum is σ = 47797200. Its totient is φ = 7616000.

The previous prime is 19119979. The next prime is 19120001. The reversal of 19120000 is 2191.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19120001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 79881 + ... + 80119.

It is an arithmetic number, because the mean of its divisors is an integer number (597465).

Almost surely, 2^19120000 is an apocalyptic number.

19120000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23898600).

19120000 is an abundant number, since it is smaller than the sum of its proper divisors (28677200).

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

19120000 is an frugal number, since it uses more digits than its factorization.

19120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 19120000 is about 4372.6422218151. The cubic root of 19120000 is about 267.4007551016.

Adding to 19120000 its reverse (2191), we get a palindrome (19122191).

The spelling of 19120000 in words is "nineteen million, one hundred twenty thousand".