698978 has 8 divisors (see below), whose sum is σ = 1198272. Its totient is φ = 299556.

The previous prime is 698977. The next prime is 698983. The reversal of 698978 is 879896.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 698978.

It is not an unprimeable number, because it can be changed into a prime (698977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24950 + ... + 24977.

It is an arithmetic number, because the mean of its divisors is an integer number (149784).

2⁶⁹⁸⁹⁷⁸ is an apocalyptic number.

698978 is a deficient number, since it is larger than the sum of its proper divisors (499294).

698978 is a wasteful number, since it uses less digits than its factorization.

698978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49936.

The product of its digits is 217728, while the sum is 47.

The square root of 698978 is about 836.0490416238. The cubic root of 698978 is about 88.7471677996.

The spelling of 698978 in words is "six hundred ninety-eight thousand, nine hundred seventy-eight".