620121624 has 64 divisors (see below), whose sum is σ = 1606521600. Its totient is φ = 199345536.

The previous prime is 620121599. The next prime is 620121637. The reversal of 620121624 is 426121026.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 620121594 and 620121603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70917 + ... + 79179.

It is an arithmetic number, because the mean of its divisors is an integer number (25101900).

Almost surely, 2^620121624 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 620121624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (803260800).

620121624 is an abundant number, since it is smaller than the sum of its proper divisors (986399976).

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

620121624 is a wasteful number, since it uses less digits than its factorization.

620121624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8384 (or 8380 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 620121624 is about 24902.2413449071. The cubic root of 620121624 is about 852.7576522179.

It can be divided in two parts, 62012 and 1624, that added together give a palindrome (63636).

The spelling of 620121624 in words is "six hundred twenty million, one hundred twenty-one thousand, six hundred twenty-four".