678672 has 40 divisors (see below), whose sum is σ = 1949280. Its totient is φ = 226080.

The previous prime is 678659. The next prime is 678719. The reversal of 678672 is 276876.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

678672 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354 + ... + 1217.

It is an arithmetic number, because the mean of its divisors is an integer number (48732).

2⁶⁷⁸⁶⁷² is an apocalyptic number.

It is an amenable number.

678672 is an abundant number, since it is smaller than the sum of its proper divisors (1270608).

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

678672 is a wasteful number, since it uses less digits than its factorization.

678672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588 (or 1576 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 678672 is about 823.8155133281. The cubic root of 678672 is about 87.8793111392.

The spelling of 678672 in words is "six hundred seventy-eight thousand, six hundred seventy-two".