219229740 has 144 divisors (see below), whose sum is σ = 699578880. Its totient is φ = 57620160.

The previous prime is 219229727. The next prime is 219229741. The reversal of 219229740 is 47922912.

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 = 219229695 and 219229704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219229741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 383655 + ... + 384225.

Almost surely, 2^219229740 is an apocalyptic number.

219229740 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 219229740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349789440).

219229740 is an abundant number, since it is smaller than the sum of its proper divisors (480349140).

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

219229740 is a wasteful number, since it uses less digits than its factorization.

219229740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 660 counting only the distinct ones).

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

The square root of 219229740 is about 14806.4087475660. The cubic root of 219229740 is about 602.9757174450.

The spelling of 219229740 in words is "two hundred nineteen million, two hundred twenty-nine thousand, seven hundred forty".