19442808 has 192 divisors, whose sum is σ = 68947200. Its totient is φ = 5019840.

The previous prime is 19442779. The next prime is 19442809. The reversal of 19442808 is 80824491.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19442809) 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 47 ways as a sum of consecutive naturals, for example, 116341 + ... + 116507.

It is an arithmetic number, because the mean of its divisors is an integer number (359100).

Almost surely, 2^19442808 is an apocalyptic number.

19442808 is a gapful number since it is divisible by the number (18) 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 19442808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34473600).

19442808 is an abundant number, since it is smaller than the sum of its proper divisors (49504392).

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

19442808 is a wasteful number, since it uses less digits than its factorization.

19442808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 19442808 is about 4409.3999591781. The cubic root of 19442808 is about 268.8972304505.

The spelling of 19442808 in words is "nineteen million, four hundred forty-two thousand, eight hundred eight".