678357 has 12 divisors (see below), whose sum is σ = 1031680. Its totient is φ = 428328.

The previous prime is 678343. The next prime is 678367. The reversal of 678357 is 753876.

It is not a de Polignac number, because 678357 - 2⁴ = 678341 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1813 + ... + 2154.

2⁶⁷⁸³⁵⁷ is an apocalyptic number.

It is an amenable number.

678357 is a deficient number, since it is larger than the sum of its proper divisors (353323).

678357 is a wasteful number, since it uses less digits than its factorization.

678357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992 (or 3989 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 678357 is about 823.6243075578. The cubic root of 678357 is about 87.8657128832.

It can be divided in two parts, 678 and 357, that added together give a triangular number (1035 = T₄₅).

The spelling of 678357 in words is "six hundred seventy-eight thousand, three hundred fifty-seven".