78236 has 6 divisors (see below), whose sum is σ = 136920. Its totient is φ = 39116.

The previous prime is 78233. The next prime is 78241. The reversal of 78236 is 63287.

It is a super-2 number, since 2×78236² = 12241743392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9776 + ... + 9783.

It is an arithmetic number, because the mean of its divisors is an integer number (22820).

2⁷⁸²³⁶ is an apocalyptic number.

It is an amenable number.

78236 is a deficient number, since it is larger than the sum of its proper divisors (58684).

78236 is a wasteful number, since it uses less digits than its factorization.

78236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19563 (or 19561 counting only the distinct ones).

The product of its digits is 2016, while the sum is 26.

The square root of 78236 is about 279.7069895444. The cubic root of 78236 is about 42.7696352011.

Subtracting from 78236 its sum of digits (26), we obtain a triangular number (78210 = T₃₉₅).

It can be divided in two parts, 782 and 36, that added together give a palindrome (818).

The spelling of 78236 in words is "seventy-eight thousand, two hundred thirty-six".