620686026 has 48 divisors (see below), whose sum is σ = 1385373600. Its totient is φ = 200690784.

The previous prime is 620686019. The next prime is 620686039.

620686026 is a `hidden beast` number, since 620 + 6 + 8 + 6 + 0 + 26 = 666.

620686026 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×620686026² = 770502285743345352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251185 + ... + 253643.

It is an arithmetic number, because the mean of its divisors is an integer number (28861950).

Almost surely, 2^620686026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620686026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (692686800).

620686026 is an abundant number, since it is smaller than the sum of its proper divisors (764687574).

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

620686026 is a wasteful number, since it uses less digits than its factorization.

620686026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883 (or 2880 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 620686026 is about 24913.5711209774. The cubic root of 620686026 is about 853.0162854506.

The spelling of 620686026 in words is "six hundred twenty million, six hundred eighty-six thousand, twenty-six".