616420 has 72 divisors (see below), whose sum is σ = 1637496. Its totient is φ = 193536.

The previous prime is 616411. The next prime is 616433. The reversal of 616420 is 24616.

It can be written as a sum of positive squares in 4 ways, for example, as 254016 + 362404 = 504^2 + 602^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16642 + ... + 16678.

It is an arithmetic number, because the mean of its divisors is an integer number (22743).

2⁶¹⁶⁴²⁰ 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 616420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (818748).

616420 is an abundant number, since it is smaller than the sum of its proper divisors (1021076).

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

616420 is a wasteful number, since it uses less digits than its factorization.

616420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 616420 is about 785.1241939974. The cubic root of 616420 is about 85.1057507311.

The spelling of 616420 in words is "six hundred sixteen thousand, four hundred twenty".