620780608 has 56 divisors (see below), whose sum is σ = 1436624000. Its totient is φ = 266039424.

The previous prime is 620780599. The next prime is 620780621. The reversal of 620780608 is 806087026.

It is a tau number, because it is divible by the number of its divisors (56).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7813 + ... + 36091.

It is an arithmetic number, because the mean of its divisors is an integer number (25654000).

Almost surely, 2^620780608 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 620780608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (718312000).

620780608 is an abundant number, since it is smaller than the sum of its proper divisors (815843392).

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

620780608 is an equidigital number, since it uses as much as digits as its factorization.

620780608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28312 (or 28288 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 620780608 is about 24915.4692510496. The cubic root of 620780608 is about 853.0596116441.

The spelling of 620780608 in words is "six hundred twenty million, seven hundred eighty thousand, six hundred eight".