616428 has 18 divisors (see below), whose sum is σ = 1558284. Its totient is φ = 205464.

The previous prime is 616411. The next prime is 616433. The reversal of 616428 is 824616.

616428 is a `hidden beast` number, since 616 + 42 + 8 = 666.

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

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 616428.

It is an unprimeable number.

616428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8526 + ... + 8597.

2⁶¹⁶⁴²⁸ is an apocalyptic number.

It is an amenable number.

616428 is an abundant number, since it is smaller than the sum of its proper divisors (941856).

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

616428 is a wasteful number, since it uses less digits than its factorization.

616428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17133 (or 17128 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 616428 is about 785.1292887162. The cubic root of 616428 is about 85.1061189017.

The spelling of 616428 in words is "six hundred sixteen thousand, four hundred twenty-eight".