78498 has 36 divisors (see below), whose sum is σ = 200070. Its totient is φ = 22176.

The previous prime is 78497. The next prime is 78509. The reversal of 78498 is 89487.

It can be written as a sum of positive squares in only one way, i.e., 74529 + 3969 = 273^2 + 63^2 .

It is not an unprimeable number, because it can be changed into a prime (78497) 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 in 17 ways as a sum of consecutive naturals, for example, 838 + ... + 926.

2⁷⁸⁴⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100035).

78498 is an abundant number, since it is smaller than the sum of its proper divisors (121572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78498 is a wasteful number, since it uses less digits than its factorization.

78498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 101 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 78498 is about 280.1749453467. The cubic root of 78498 is about 42.8173249220.

It can be divided in two parts, 78 and 498, that added together give a square (576 = 24²).

The spelling of 78498 in words is "seventy-eight thousand, four hundred ninety-eight".