616643928 has 120 divisors (see below), whose sum is σ = 1770387300. Its totient is φ = 200473056.

The previous prime is 616643903. The next prime is 616643953. The reversal of 616643928 is 829346616.

616643928 is a `hidden beast` number, since 616 + 6 + 4 + 3 + 9 + 28 = 666.

It is an interprime number because it is at equal distance from previous prime (616643903) and next prime (616643953).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 4855401 + ... + 4855527.

Almost surely, 2^616643928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 616643928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (885193650).

616643928 is an abundant number, since it is smaller than the sum of its proper divisors (1153743372).

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

616643928 is a wasteful number, since it uses less digits than its factorization.

616643928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 191 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 616643928 is about 24832.3162028837. The cubic root of 616643928 is about 851.1605498975.

The spelling of 616643928 in words is "six hundred sixteen million, six hundred forty-three thousand, nine hundred twenty-eight".