219681396 has 120 divisors (see below), whose sum is σ = 638868384. Its totient is φ = 65257920.

The previous prime is 219681377. The next prime is 219681419. The reversal of 219681396 is 693186912.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 188311 + ... + 189473.

Almost surely, 2^219681396 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 219681396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319434192).

219681396 is an abundant number, since it is smaller than the sum of its proper divisors (419186988).

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

219681396 is a wasteful number, since it uses less digits than its factorization.

219681396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243 (or 1232 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 219681396 is about 14821.6529442569. The cubic root of 219681396 is about 603.3895159128.

The spelling of 219681396 in words is "two hundred nineteen million, six hundred eighty-one thousand, three hundred ninety-six".