219490740 has 144 divisors (see below), whose sum is σ = 805738752. Its totient is φ = 47213568.

The previous prime is 219490729. The next prime is 219490769. The reversal of 219490740 is 47094912.

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 = 219490695 and 219490704.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16297 + ... + 26543.

It is an arithmetic number, because the mean of its divisors is an integer number (5595408).

Almost surely, 2^219490740 is an apocalyptic number.

219490740 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 219490740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402869376).

219490740 is an abundant number, since it is smaller than the sum of its proper divisors (586248012).

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

219490740 is a wasteful number, since it uses less digits than its factorization.

219490740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10286 (or 10281 counting only the distinct ones).

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

The square root of 219490740 is about 14815.2198768699. The cubic root of 219490740 is about 603.2149098245.

The spelling of 219490740 in words is "two hundred nineteen million, four hundred ninety thousand, seven hundred forty".