620039556 has 96 divisors (see below), whose sum is σ = 1700213760. Its totient is φ = 195091200.

The previous prime is 620039551. The next prime is 620039561. The reversal of 620039556 is 655930026.

It is an interprime number because it is at equal distance from previous prime (620039551) and next prime (620039561).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 620039556.

It is not an unprimeable number, because it can be changed into a prime (620039551) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 135010 + ... + 139526.

It is an arithmetic number, because the mean of its divisors is an integer number (17710560).

Almost surely, 2^620039556 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 620039556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850106880).

620039556 is an abundant number, since it is smaller than the sum of its proper divisors (1080174204).

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

620039556 is a wasteful number, since it uses less digits than its factorization.

620039556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4602 (or 4594 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 620039556 is about 24900.5934869031. The cubic root of 620039556 is about 852.7200320696.

The spelling of 620039556 in words is "six hundred twenty million, thirty-nine thousand, five hundred fifty-six".