616139384 has 72 divisors (see below), whose sum is σ = 1377132120. Its totient is φ = 253153440.

The previous prime is 616139383. The next prime is 616139413. The reversal of 616139384 is 483931616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616139383) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5758259 + ... + 5758365.

It is an arithmetic number, because the mean of its divisors is an integer number (19126835).

Almost surely, 2^616139384 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 616139384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (688566060).

616139384 is an abundant number, since it is smaller than the sum of its proper divisors (760992736).

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

616139384 is a wasteful number, since it uses less digits than its factorization.

616139384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 147 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 616139384 is about 24822.1551038583. The cubic root of 616139384 is about 850.9283439689.

The spelling of 616139384 in words is "six hundred sixteen million, one hundred thirty-nine thousand, three hundred eighty-four".