616138 has 8 divisors (see below), whose sum is σ = 937440. Its totient is φ = 303660.

The previous prime is 616129. The next prime is 616139. The reversal of 616138 is 831616.

616138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (616139) by changing a digit.

616138 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 3 ways as a sum of consecutive naturals, for example, 2028 + ... + 2311.

It is an arithmetic number, because the mean of its divisors is an integer number (117180).

2⁶¹⁶¹³⁸ is an apocalyptic number.

616138 is a deficient number, since it is larger than the sum of its proper divisors (321302).

616138 is a wasteful number, since it uses less digits than its factorization.

616138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4412.

The product of its digits is 864, while the sum is 25.

The square root of 616138 is about 784.9445840313. The cubic root of 616138 is about 85.0927706837.

The spelling of 616138 in words is "six hundred sixteen thousand, one hundred thirty-eight".