78284 has 6 divisors (see below), whose sum is σ = 137004. Its totient is φ = 39140.

The previous prime is 78283. The next prime is 78301. The reversal of 78284 is 48287.

It is a super-2 number, since 2×78284² = 12256769312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9782 + ... + 9789.

It is an arithmetic number, because the mean of its divisors is an integer number (22834).

2⁷⁸²⁸⁴ is an apocalyptic number.

It is an amenable number.

78284 is a deficient number, since it is larger than the sum of its proper divisors (58720).

78284 is a wasteful number, since it uses less digits than its factorization.

78284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19575 (or 19573 counting only the distinct ones).

The product of its digits is 3584, while the sum is 29.

The square root of 78284 is about 279.7927804644. The cubic root of 78284 is about 42.7783802068.

The spelling of 78284 in words is "seventy-eight thousand, two hundred eighty-four".