78384284 has 36 divisors (see below), whose sum is σ = 152967024. Its totient is φ = 35112000.

The previous prime is 78384283. The next prime is 78384307. The reversal of 78384284 is 48248387.

It is a super-2 number, since 2×78384284² = 12288191956385312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78384283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33224 + ... + 35504.

It is an arithmetic number, because the mean of its divisors is an integer number (4249084).

Almost surely, 2^78384284 is an apocalyptic number.

It is an amenable number.

78384284 is a deficient number, since it is larger than the sum of its proper divisors (74582740).

78384284 is a wasteful number, since it uses less digits than its factorization.

78384284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2378 (or 2365 counting only the distinct ones).

The product of its digits is 344064, while the sum is 44.

The square root of 78384284 is about 8853.4899333540. The cubic root of 78384284 is about 427.9663918060.

The spelling of 78384284 in words is "seventy-eight million, three hundred eighty-four thousand, two hundred eighty-four".