19449800 has 48 divisors (see below), whose sum is σ = 45830400. Its totient is φ = 7675200.

The previous prime is 19449797. The next prime is 19449809. The reversal of 19449800 is 894491.

It is not an unprimeable number, because it can be changed into a prime (19449809) 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 11 ways as a sum of consecutive naturals, for example, 15185 + ... + 16415.

It is an arithmetic number, because the mean of its divisors is an integer number (954800).

Almost surely, 2^19449800 is an apocalyptic number.

19449800 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 19449800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22915200).

19449800 is an abundant number, since it is smaller than the sum of its proper divisors (26380600).

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

19449800 is a wasteful number, since it uses less digits than its factorization.

19449800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326 (or 1317 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 19449800 is about 4410.1927395523. The cubic root of 19449800 is about 268.9294600905.

It can be divided in two parts, 194 and 49800, that added together give a palindrome (49994).

The spelling of 19449800 in words is "nineteen million, four hundred forty-nine thousand, eight hundred".