78698 has 12 divisors (see below), whose sum is σ = 125730. Its totient is φ = 36936.

The previous prime is 78697. The next prime is 78707. The reversal of 78698 is 89687.

It can be written as a sum of positive squares in only one way, i.e., 61009 + 17689 = 247^2 + 133^2 .

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (78691) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 668 + ... + 776.

2⁷⁸⁶⁹⁸ is an apocalyptic number.

78698 is a deficient number, since it is larger than the sum of its proper divisors (47032).

78698 is a wasteful number, since it uses less digits than its factorization.

78698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 130 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 78698 is about 280.5316381444. The cubic root of 78698 is about 42.8536579177.

It can be divided in two parts, 786 and 98, that multiplied together give a triangular number (77028 = T₃₉₂).

The spelling of 78698 in words is "seventy-eight thousand, six hundred ninety-eight".