219316428 has 18 divisors (see below), whose sum is σ = 554383284. Its totient is φ = 73105464.

The previous prime is 219316423. The next prime is 219316441. The reversal of 219316428 is 824613912.

219316428 is a `hidden beast` number, since 2 + 1 + 9 + 3 + 1 + 642 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6092123 = 219316428 / (2 + 1 + 9 + 3 + 1 + 6 + 4 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 219316392 and 219316401.

It is not an unprimeable number, because it can be changed into a prime (219316423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3046026 + ... + 3046097.

Almost surely, 2^219316428 is an apocalyptic number.

It is an amenable number.

219316428 is an abundant number, since it is smaller than the sum of its proper divisors (335066856).

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

219316428 is a wasteful number, since it uses less digits than its factorization.

219316428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6092133 (or 6092128 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 219316428 is about 14809.3358392603. The cubic root of 219316428 is about 603.0551833527.

The spelling of 219316428 in words is "two hundred nineteen million, three hundred sixteen thousand, four hundred twenty-eight".