623172 has 24 divisors (see below), whose sum is σ = 1586592. Its totient is φ = 188800.

The previous prime is 623171. The next prime is 623209. The reversal of 623172 is 271326.

It is a happy number.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 623172.

It is not an unprimeable number, because it can be changed into a prime (623171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2229 + ... + 2492.

It is an arithmetic number, because the mean of its divisors is an integer number (66108).

2⁶²³¹⁷² is an apocalyptic number.

It is an amenable number.

623172 is an abundant number, since it is smaller than the sum of its proper divisors (963420).

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

623172 is a wasteful number, since it uses less digits than its factorization.

623172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4739 (or 4737 counting only the distinct ones).

The product of its digits is 504, while the sum is 21.

The square root of 623172 is about 789.4124397297. The cubic root of 623172 is about 85.4153603079.

Adding to 623172 its reverse (271326), we get a palindrome (894498).

The spelling of 623172 in words is "six hundred twenty-three thousand, one hundred seventy-two".