219704940 has 384 divisors, whose sum is σ = 894136320. Its totient is φ = 43462656.

The previous prime is 219704921. The next prime is 219704941. The reversal of 219704940 is 49407912.

219704940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 219704895 and 219704904.

It is not an unprimeable number, because it can be changed into a prime (219704941) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 835249 + ... + 835511.

It is an arithmetic number, because the mean of its divisors is an integer number (2328480).

Almost surely, 2^219704940 is an apocalyptic number.

219704940 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 219704940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (447068160).

219704940 is an abundant number, since it is smaller than the sum of its proper divisors (674431380).

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

219704940 is a wasteful number, since it uses less digits than its factorization.

219704940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 219704940 is about 14822.4471663757. The cubic root of 219704940 is about 603.4110709095.

The spelling of 219704940 in words is "two hundred nineteen million, seven hundred four thousand, nine hundred forty".