620518734 has 72 divisors (see below), whose sum is σ = 1564814160. Its totient is φ = 176964480.

The previous prime is 620518733. The next prime is 620518741. The reversal of 620518734 is 437815026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620518733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 28647 + ... + 45405.

It is an arithmetic number, because the mean of its divisors is an integer number (21733530).

Almost surely, 2^620518734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620518734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (782407080).

620518734 is an abundant number, since it is smaller than the sum of its proper divisors (944295426).

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

620518734 is a wasteful number, since it uses less digits than its factorization.

620518734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16806 (or 16792 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 620518734 is about 24910.2134474998. The cubic root of 620518734 is about 852.9396414271.

The spelling of 620518734 in words is "six hundred twenty million, five hundred eighteen thousand, seven hundred thirty-four".