19120640 has 160 divisors (see below), whose sum is σ = 57746304. Its totient is φ = 5898240.

The previous prime is 19120639. The next prime is 19120643. The reversal of 19120640 is 4602191.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

It is not an unprimeable number, because it can be changed into a prime (19120643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197072 + ... + 197168.

Almost surely, 2^19120640 is an apocalyptic number.

19120640 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 19120640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28873152).

19120640 is an abundant number, since it is smaller than the sum of its proper divisors (38625664).

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

19120640 is an equidigital number, since it uses as much as digits as its factorization.

19120640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 19120640 is about 4372.7154034993. The cubic root of 19120640 is about 267.4037386193.

The spelling of 19120640 in words is "nineteen million, one hundred twenty thousand, six hundred forty".