620172 has 72 divisors (see below), whose sum is σ = 1886976. Its totient is φ = 167904.

The previous prime is 620171. The next prime is 620183. The reversal of 620172 is 271026.

It is a happy number.

620172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×620172² = 769226619168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620172.

It is not an unprimeable number, because it can be changed into a prime (620171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5743 + ... + 5849.

It is an arithmetic number, because the mean of its divisors is an integer number (26208).

2⁶²⁰¹⁷² 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 620172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943488).

620172 is an abundant number, since it is smaller than the sum of its proper divisors (1266804).

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

620172 is a wasteful number, since it uses less digits than its factorization.

620172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 620172 is about 787.5099999365. The cubic root of 620172 is about 85.2780743041.

Adding to 620172 its reverse (271026), we get a palindrome (891198).

The spelling of 620172 in words is "six hundred twenty thousand, one hundred seventy-two".