620552064 has 128 divisors (see below), whose sum is σ = 1816318080. Its totient is φ = 186152960.

The previous prime is 620552041. The next prime is 620552081. The reversal of 620552064 is 460255026.

It is a tau number, because it is divible by the number of its divisors (128).

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, 451282 + ... + 452654.

It is an arithmetic number, because the mean of its divisors is an integer number (14189985).

Almost surely, 2^620552064 is an apocalyptic number.

620552064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620552064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (908159040).

620552064 is an abundant number, since it is smaller than the sum of its proper divisors (1195766016).

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

620552064 is a wasteful number, since it uses less digits than its factorization.

620552064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508 (or 1496 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 620552064 is about 24910.8824412143. The cubic root of 620552064 is about 852.9549125047.

The spelling of 620552064 in words is "six hundred twenty million, five hundred fifty-two thousand, sixty-four".