620790624 has 108 divisors (see below), whose sum is σ = 1824971148. Its totient is φ = 200165760.

The previous prime is 620790623. The next prime is 620790637. The reversal of 620790624 is 426097026.

It is a happy number.

620790624 is a `hidden beast` number, since 6 + 20 + 7 + 9 + 0 + 624 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620790623) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 275647 + ... + 277889.

It is an arithmetic number, because the mean of its divisors is an integer number (16897881).

Almost surely, 2^620790624 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 620790624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (912485574).

620790624 is an abundant number, since it is smaller than the sum of its proper divisors (1204180524).

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

620790624 is a wasteful number, since it uses less digits than its factorization.

620790624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321 (or 2279 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 620790624 is about 24915.6702498648. The cubic root of 620790624 is about 853.0641995232.

The spelling of 620790624 in words is "six hundred twenty million, seven hundred ninety thousand, six hundred twenty-four".