219428744 has 16 divisors (see below), whose sum is σ = 415671900. Its totient is φ = 108582912.

The previous prime is 219428723. The next prime is 219428749. The reversal of 219428744 is 447824912.

It can be written as a sum of positive squares in 2 ways, for example, as 217208644 + 2220100 = 14738^2 + 1490^2 .

It is not an unprimeable number, because it can be changed into a prime (219428749) 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, 140609 + ... + 142160.

Almost surely, 2^219428744 is an apocalyptic number.

It is an amenable number.

219428744 is a deficient number, since it is larger than the sum of its proper divisors (196243156).

219428744 is a wasteful number, since it uses less digits than its factorization.

219428744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282872 (or 282868 counting only the distinct ones).

The product of its digits is 129024, while the sum is 41.

The square root of 219428744 is about 14813.1274213111. The cubic root of 219428744 is about 603.1581110228.

The spelling of 219428744 in words is "two hundred nineteen million, four hundred twenty-eight thousand, seven hundred forty-four".