19489896 has 80 divisors (see below), whose sum is σ = 57499200. Its totient is φ = 6150816.

The previous prime is 19489889. The next prime is 19489907. The reversal of 19489896 is 69898491.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11521 + ... + 13103.

It is an arithmetic number, because the mean of its divisors is an integer number (718740).

Almost surely, 2^19489896 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 19489896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28749600).

19489896 is an abundant number, since it is smaller than the sum of its proper divisors (38009304).

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

19489896 is a wasteful number, since it uses less digits than its factorization.

19489896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620 (or 1607 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 19489896 is about 4414.7362322114. The cubic root of 19489896 is about 269.1141337006.

The spelling of 19489896 in words is "nineteen million, four hundred eighty-nine thousand, eight hundred ninety-six".