678172 has 12 divisors (see below), whose sum is σ = 1294776. Its totient is φ = 308240.

The previous prime is 678169. The next prime is 678179. The reversal of 678172 is 271876.

It is a happy number.

It is a super-3 number, since 3×678172³ = 935709027368833344, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7663 + ... + 7750.

It is an arithmetic number, because the mean of its divisors is an integer number (107898).

2⁶⁷⁸¹⁷² is an apocalyptic number.

It is an amenable number.

678172 is a deficient number, since it is larger than the sum of its proper divisors (616604).

678172 is a wasteful number, since it uses less digits than its factorization.

678172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15428 (or 15426 counting only the distinct ones).

The product of its digits is 4704, while the sum is 31.

The square root of 678172 is about 823.5119914124. The cubic root of 678172 is about 87.8577246435.

The spelling of 678172 in words is "six hundred seventy-eight thousand, one hundred seventy-two".