19542798 has 48 divisors (see below), whose sum is σ = 46753200. Its totient is φ = 5850240.

The previous prime is 19542797. The next prime is 19542851. The reversal of 19542798 is 89724591.

19542798 is a `hidden beast` number, since 19 + 542 + 7 + 98 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19542797) 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 23 ways as a sum of consecutive naturals, for example, 17068 + ... + 18176.

It is an arithmetic number, because the mean of its divisors is an integer number (974025).

Almost surely, 2^19542798 is an apocalyptic number.

19542798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19542798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23376600).

19542798 is an abundant number, since it is smaller than the sum of its proper divisors (27210402).

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

19542798 is a wasteful number, since it uses less digits than its factorization.

19542798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217 (or 1214 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 19542798 is about 4420.7236964099. The cubic root of 19542798 is about 269.3574018754.

The spelling of 19542798 in words is "nineteen million, five hundred forty-two thousand, seven hundred ninety-eight".