678464 has 14 divisors (see below), whose sum is σ = 1346454. Its totient is φ = 339200.

The previous prime is 678463. The next prime is 678479. The reversal of 678464 is 464876.

It can be written as a sum of positive squares in only one way, i.e., 652864 + 25600 = 808^2 + 160^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5237 + ... + 5364.

2⁶⁷⁸⁴⁶⁴ is an apocalyptic number.

678464 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

678464 is a deficient number, since it is larger than the sum of its proper divisors (667990).

678464 is a wasteful number, since it uses less digits than its factorization.

678464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10613 (or 10603 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 678464 is about 823.6892617972. The cubic root of 678464 is about 87.8703324453.

The spelling of 678464 in words is "six hundred seventy-eight thousand, four hundred sixty-four".