620308836 has 81 divisors (see below), whose sum is σ = 1827084441. Its totient is φ = 176932224.

The previous prime is 620308763. The next prime is 620308837. The reversal of 620308836 is 638803026.

The square root of 620308836 is 24906.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 381420900 + 238887936 = 19530^2 + 15456^2 .

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 620308836.

It is not an unprimeable number, because it can be changed into a prime (620308837) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1045756 + ... + 1046348.

Almost surely, 2^620308836 is an apocalyptic number.

620308836 is the 24906-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620308836

620308836 is an abundant number, since it is smaller than the sum of its proper divisors (1206775605).

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

620308836 is a wasteful number, since it uses less digits than its factorization.

620308836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210 (or 605 counting only the distinct ones).

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

The cubic root of 620308836 is about 852.8434581827.

Multiplying 620308836 by its sum of digits (36), we get a square (22331118096 = 149436²).

620308836 divided by its sum of digits (36) gives a square (17230801 = 4151²).

The spelling of 620308836 in words is "six hundred twenty million, three hundred eight thousand, eight hundred thirty-six".