678472 has 8 divisors (see below), whose sum is σ = 1272150. Its totient is φ = 339232.

The previous prime is 678463. The next prime is 678479. The reversal of 678472 is 274876.

It can be written as a sum of positive squares in only one way, i.e., 662596 + 15876 = 814^2 + 126^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (678479) by changing a digit.

678472 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 as a sum of consecutive naturals, namely, 42397 + ... + 42412.

2⁶⁷⁸⁴⁷² is an apocalyptic number.

It is an amenable number.

678472 is a deficient number, since it is larger than the sum of its proper divisors (593678).

678472 is a wasteful number, since it uses less digits than its factorization.

678472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84815 (or 84811 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 678472 is about 823.6941179831. The cubic root of 678472 is about 87.8706778136.

The spelling of 678472 in words is "six hundred seventy-eight thousand, four hundred seventy-two".