620172720 has 80 divisors (see below), whose sum is σ = 2136157920. Its totient is φ = 165378816.

The previous prime is 620172689. The next prime is 620172739. The reversal of 620172720 is 27271026.

620172720 is a `hidden beast` number, since 620 + 17 + 2 + 7 + 20 = 666.

620172720 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 (80).

It is a super-2 number, since 2×620172720² = 769228405264396800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 141399 + ... + 145718.

It is an arithmetic number, because the mean of its divisors is an integer number (26701974).

Almost surely, 2^620172720 is an apocalyptic number.

620172720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620172720 is an abundant number, since it is smaller than the sum of its proper divisors (1515985200).

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

620172720 is a wasteful number, since it uses less digits than its factorization.

620172720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287139 (or 287127 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 620172720 is about 24903.2672555229. The cubic root of 620172720 is about 852.7810730581.

The spelling of 620172720 in words is "six hundred twenty million, one hundred seventy-two thousand, seven hundred twenty".