219128440 has 16 divisors (see below), whose sum is σ = 493039080. Its totient is φ = 87651360.

The previous prime is 219128431. The next prime is 219128443. The reversal of 219128440 is 44821912.

219128440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219128443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2739066 + ... + 2739145.

Almost surely, 2^219128440 is an apocalyptic number.

219128440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

219128440 is an abundant number, since it is smaller than the sum of its proper divisors (273910640).

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

219128440 is a wasteful number, since it uses less digits than its factorization.

219128440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5478222 (or 5478218 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 219128440 is about 14802.9875363050. The cubic root of 219128440 is about 602.8828303355.

The spelling of 219128440 in words is "two hundred nineteen million, one hundred twenty-eight thousand, four hundred forty".