219936340 has 24 divisors (see below), whose sum is σ = 497395080. Its totient is φ = 81207168.

The previous prime is 219936329. The next prime is 219936347. The reversal of 219936340 is 43639912.

It can be written as a sum of positive squares in 4 ways, for example, as 777924 + 219158416 = 882^2 + 14804^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 219936340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219936347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422695 + ... + 423214.

It is an arithmetic number, because the mean of its divisors is an integer number (20724795).

Almost surely, 2^219936340 is an apocalyptic number.

219936340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

219936340 is an abundant number, since it is smaller than the sum of its proper divisors (277458740).

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

219936340 is a wasteful number, since it uses less digits than its factorization.

219936340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845931 (or 845929 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 219936340 is about 14830.2508407646. The cubic root of 219936340 is about 603.6228402790.

The spelling of 219936340 in words is "two hundred nineteen million, nine hundred thirty-six thousand, three hundred forty".