78938 has 8 divisors (see below), whose sum is σ = 122580. Its totient is φ = 38080.

The previous prime is 78929. The next prime is 78941. The reversal of 78938 is 83987.

It can be written as a sum of positive squares in 2 ways, for example, as 76729 + 2209 = 277^2 + 47^2 .

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

It is a Curzon number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 78898 and 78907.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623 + ... + 738.

2⁷⁸⁹³⁸ is an apocalyptic number.

78938 is a deficient number, since it is larger than the sum of its proper divisors (43642).

78938 is a wasteful number, since it uses less digits than its factorization.

78938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392.

The product of its digits is 12096, while the sum is 35.

The square root of 78938 is about 280.9590717525. The cubic root of 78938 is about 42.8971763491.

The spelling of 78938 in words is "seventy-eight thousand, nine hundred thirty-eight".