78369 has 8 divisors (see below), whose sum is σ = 105792. Its totient is φ = 51600.

The previous prime is 78367. The next prime is 78401. The reversal of 78369 is 96387.

It is a happy number.

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

It is not a de Polignac number, because 78369 - 2¹ = 78367 is a prime.

It is a super-2 number, since 2×78369² = 12283400322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (78367) 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, 367 + ... + 539.

It is an arithmetic number, because the mean of its divisors is an integer number (13224).

2⁷⁸³⁶⁹ is an apocalyptic number.

It is an amenable number.

78369 is a deficient number, since it is larger than the sum of its proper divisors (27423).

78369 is a wasteful number, since it uses less digits than its factorization.

78369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327.

The product of its digits is 9072, while the sum is 33.

The square root of 78369 is about 279.9446373839. The cubic root of 78369 is about 42.7938573885.

It can be divided in two parts, 78 and 369, that multiplied together give a palindrome (28782).

The spelling of 78369 in words is "seventy-eight thousand, three hundred sixty-nine".