219797380 has 96 divisors (see below), whose sum is σ = 532707840. Its totient is φ = 75425280.

The previous prime is 219797371. The next prime is 219797387. The reversal of 219797380 is 83797912.

It is a happy number.

219797380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 219797380.

It is not an unprimeable number, because it can be changed into a prime (219797387) 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, 299494 + ... + 300226.

It is an arithmetic number, because the mean of its divisors is an integer number (5549040).

Almost surely, 2^219797380 is an apocalyptic number.

219797380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 219797380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266353920).

219797380 is an abundant number, since it is smaller than the sum of its proper divisors (312910460).

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

219797380 is a wasteful number, since it uses less digits than its factorization.

219797380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829 (or 827 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 219797380 is about 14825.5650819792. The cubic root of 219797380 is about 603.4956866647.

The spelling of 219797380 in words is "two hundred nineteen million, seven hundred ninety-seven thousand, three hundred eighty".