678490 has 16 divisors (see below), whose sum is σ = 1285920. Its totient is φ = 257040.

The previous prime is 678481. The next prime is 678493. The reversal of 678490 is 94876.

678490 is nontrivially palindromic in base 4 and base 16.

678490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

678490 is an undulating number in base 16.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (678493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1596 + ... + 1975.

It is an arithmetic number, because the mean of its divisors is an integer number (80370).

2⁶⁷⁸⁴⁹⁰ is an apocalyptic number.

678490 is a deficient number, since it is larger than the sum of its proper divisors (607430).

678490 is a wasteful number, since it uses less digits than its factorization.

678490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3597.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 678490 is about 823.7050442968. The cubic root of 678490 is about 87.8714548824.

The spelling of 678490 in words is "six hundred seventy-eight thousand, four hundred ninety".