620864880 has 80 divisors (see below), whose sum is σ = 1953458304. Its totient is φ = 163088640.

The previous prime is 620864851. The next prime is 620864887. The reversal of 620864880 is 88468026.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620864887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3226 + ... + 35385.

Almost surely, 2^620864880 is an apocalyptic number.

620864880 is a gapful number since it is divisible by the number (60) 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 620864880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (976729152).

620864880 is an abundant number, since it is smaller than the sum of its proper divisors (1332593424).

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

620864880 is a wasteful number, since it uses less digits than its factorization.

620864880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38694 (or 38688 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 620864880 is about 24917.1603518539. The cubic root of 620864880 is about 853.0982113179.

It can be divided in two parts, 62086 and 4880, that added together give a palindrome (66966).

The spelling of 620864880 in words is "six hundred twenty million, eight hundred sixty-four thousand, eight hundred eighty".