620521224 has 64 divisors (see below), whose sum is σ = 1601087040. Its totient is φ = 200279040.

The previous prime is 620521217. The next prime is 620521259. The reversal of 620521224 is 422125026.

It is a happy number.

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 = 620521194 and 620521203.

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, 132507 + ... + 137109.

It is an arithmetic number, because the mean of its divisors is an integer number (25016985).

Almost surely, 2^620521224 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 620521224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (800543520).

620521224 is an abundant number, since it is smaller than the sum of its proper divisors (980565816).

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

620521224 is a wasteful number, since it uses less digits than its factorization.

620521224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4790 (or 4786 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 620521224 is about 24910.2634269491. The cubic root of 620521224 is about 852.9407823096.

The spelling of 620521224 in words is "six hundred twenty million, five hundred twenty-one thousand, two hundred twenty-four".