19399716 has 96 divisors (see below), whose sum is σ = 58490880. Its totient is φ = 5445792.

The previous prime is 19399697. The next prime is 19399717. The reversal of 19399716 is 61799391.

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

It is not an unprimeable number, because it can be changed into a prime (19399717) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50461 + ... + 50843.

It is an arithmetic number, because the mean of its divisors is an integer number (609280).

Almost surely, 2^19399716 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 19399716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29245440).

19399716 is an abundant number, since it is smaller than the sum of its proper divisors (39091164).

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

19399716 is a wasteful number, since it uses less digits than its factorization.

19399716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 462 counting only the distinct ones).

The product of its digits is 91854, while the sum is 45.

The square root of 19399716 is about 4404.5108695518. The cubic root of 19399716 is about 268.6984270247.

The spelling of 19399716 in words is "nineteen million, three hundred ninety-nine thousand, seven hundred sixteen".