616540 has 24 divisors (see below), whose sum is σ = 1340640. Its totient is φ = 237888.

The previous prime is 616537. The next prime is 616547. The reversal of 616540 is 45616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49 + ... + 1111.

It is an arithmetic number, because the mean of its divisors is an integer number (55860).

2⁶¹⁶⁵⁴⁰ 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 616540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (670320).

616540 is an abundant number, since it is smaller than the sum of its proper divisors (724100).

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

616540 is a wasteful number, since it uses less digits than its factorization.

616540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101 (or 1099 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 616540 is about 785.2006113090. The cubic root of 616540 is about 85.1112729548. Note that the first 3 decimals are identical.

It can be divided in two parts, 616 and 540, that added together give a square (1156 = 34²).

The spelling of 616540 in words is "six hundred sixteen thousand, five hundred forty".