19794400 has 72 divisors (see below), whose sum is σ = 48981240. Its totient is φ = 7810560.

The previous prime is 19794391. The next prime is 19794407. The reversal of 19794400 is 449791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19794407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87087 + ... + 87313.

It is an arithmetic number, because the mean of its divisors is an integer number (680295).

Almost surely, 2^19794400 is an apocalyptic number.

19794400 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 19794400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24490620).

19794400 is an abundant number, since it is smaller than the sum of its proper divisors (29186840).

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

19794400 is a wasteful number, since it uses less digits than its factorization.

19794400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 19794400 is about 4449.0897945535. The cubic root of 19794400 is about 270.5084156130.

The spelling of 19794400 in words is "nineteen million, seven hundred ninety-four thousand, four hundred".