620439456 has 384 divisors, whose sum is σ = 2167603200. Its totient is φ = 150958080.

The previous prime is 620439439. The next prime is 620439473. The reversal of 620439456 is 654934026.

620439456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (620439439) and next prime (620439473).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7853625 + ... + 7853703.

It is an arithmetic number, because the mean of its divisors is an integer number (5644800).

Almost surely, 2^620439456 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 620439456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1083801600).

620439456 is an abundant number, since it is smaller than the sum of its proper divisors (1547163744).

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

620439456 is a wasteful number, since it uses less digits than its factorization.

620439456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 620439456 is about 24908.6221216670. The cubic root of 620439456 is about 852.9033157826.

The spelling of 620439456 in words is "six hundred twenty million, four hundred thirty-nine thousand, four hundred fifty-six".