620464608 has 144 divisors (see below), whose sum is σ = 1872234000. Its totient is φ = 194365440.

The previous prime is 620464577. The next prime is 620464609. The reversal of 620464608 is 806464026.

It is a happy number.

620464608 is a `hidden beast` number, since 6 + 2 + 0 + 4 + 646 + 0 + 8 = 666.

620464608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

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 (620464609) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 814948 + ... + 815708.

It is an arithmetic number, because the mean of its divisors is an integer number (13001625).

Almost surely, 2^620464608 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 620464608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (936117000).

620464608 is an abundant number, since it is smaller than the sum of its proper divisors (1251769392).

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

620464608 is a wasteful number, since it uses less digits than its factorization.

620464608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 620464608 is about 24909.1270019646. The cubic root of 620464608 is about 852.9148409116.

The spelling of 620464608 in words is "six hundred twenty million, four hundred sixty-four thousand, six hundred eight".