219169040 has 20 divisors (see below), whose sum is σ = 509568204. Its totient is φ = 87667584.

The previous prime is 219169033. The next prime is 219169043. The reversal of 219169040 is 40961912.

It can be written as a sum of positive squares in 2 ways, for example, as 61716736 + 157452304 = 7856^2 + 12548^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 219168988 and 219169006.

It is not an unprimeable number, because it can be changed into a prime (219169043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1369727 + ... + 1369886.

Almost surely, 2^219169040 is an apocalyptic number.

219169040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

219169040 is an abundant number, since it is smaller than the sum of its proper divisors (290399164).

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

219169040 is a wasteful number, since it uses less digits than its factorization.

219169040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739626 (or 2739620 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 219169040 is about 14804.3588175915. The cubic root of 219169040 is about 602.9200619721.

The spelling of 219169040 in words is "two hundred nineteen million, one hundred sixty-nine thousand, forty".