616440258 has 96 divisors (see below), whose sum is σ = 1565316480. Its totient is φ = 171694080.

The previous prime is 616440221. The next prime is 616440277. The reversal of 616440258 is 852044616.

616440258 is a `hidden beast` number, since 6 + 1 + 644 + 0 + 2 + 5 + 8 = 666.

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 47 ways as a sum of consecutive naturals, for example, 1068066 + ... + 1068642.

It is an arithmetic number, because the mean of its divisors is an integer number (16305380).

Almost surely, 2^616440258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 616440258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (782658240).

616440258 is an abundant number, since it is smaller than the sum of its proper divisors (948876222).

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

616440258 is a wasteful number, since it uses less digits than its factorization.

616440258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 616440258 is about 24828.2149579868. The cubic root of 616440258 is about 851.0668302480.

The spelling of 616440258 in words is "six hundred sixteen million, four hundred forty thousand, two hundred fifty-eight".