19490768 has 40 divisors (see below), whose sum is σ = 41916960. Its totient is φ = 8704640.

The previous prime is 19490767. The next prime is 19490777. The reversal of 19490768 is 86709491.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19490761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9446 + ... + 11322.

It is an arithmetic number, because the mean of its divisors is an integer number (1047924).

Almost surely, 2^19490768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19490768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20958480).

19490768 is an abundant number, since it is smaller than the sum of its proper divisors (22426192).

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

19490768 is a wasteful number, since it uses less digits than its factorization.

19490768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955 (or 1949 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 19490768 is about 4414.8349912539. The cubic root of 19490768 is about 269.1181471310.

The spelling of 19490768 in words is "nineteen million, four hundred ninety thousand, seven hundred sixty-eight".