620513556 has 48 divisors (see below), whose sum is σ = 1566319104. Its totient is φ = 190060416.

The previous prime is 620513539. The next prime is 620513567. The reversal of 620513556 is 655315026.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 25870 + ... + 43706.

It is an arithmetic number, because the mean of its divisors is an integer number (32631648).

Almost surely, 2^620513556 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 620513556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (783159552).

620513556 is an abundant number, since it is smaller than the sum of its proper divisors (945805548).

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

620513556 is a wasteful number, since it uses less digits than its factorization.

620513556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18080 (or 18078 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 620513556 is about 24910.1095140106. The cubic root of 620513556 is about 852.9372689316.

The spelling of 620513556 in words is "six hundred twenty million, five hundred thirteen thousand, five hundred fifty-six".