19395216 has 45 divisors (see below), whose sum is σ = 54427971. Its totient is φ = 6447456.

The previous prime is 19395197. The next prime is 19395217. The reversal of 19395216 is 61259391.

The square root of 19395216 is 4404.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (19395217) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 52665 + ... + 53031.

Almost surely, 2^19395216 is an apocalyptic number.

19395216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

19395216 is the 4404-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19395216

19395216 is an abundant number, since it is smaller than the sum of its proper divisors (35032755).

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

19395216 is an equidigital number, since it uses as much as digits as its factorization.

19395216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748 (or 372 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The cubic root of 19395216 is about 268.6776494623.

Multiplying 19395216 by its sum of digits (36), we get a square (698227776 = 26424²).

19395216 divided by its sum of digits (36) gives a square (538756 = 734²).

The spelling of 19395216 in words is "nineteen million, three hundred ninety-five thousand, two hundred sixteen".