19230640 has 120 divisors (see below), whose sum is σ = 53840304. Its totient is φ = 6297600.

The previous prime is 19230623. The next prime is 19230643. The reversal of 19230640 is 4603291.

It is not an unprimeable number, because it can be changed into a prime (19230643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 469020 + ... + 469060.

Almost surely, 2^19230640 is an apocalyptic number.

19230640 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 19230640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26920152).

19230640 is an abundant number, since it is smaller than the sum of its proper divisors (34609664).

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

19230640 is a wasteful number, since it uses less digits than its factorization.

19230640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 19230640 is about 4385.2753619357. The cubic root of 19230640 is about 267.9155447851.

The spelling of 19230640 in words is "nineteen million, two hundred thirty thousand, six hundred forty".