78384868 has 24 divisors (see below), whose sum is σ = 139567680. Its totient is φ = 38513760.

The previous prime is 78384857. The next prime is 78384869. The reversal of 78384868 is 86848387.

It is a super-2 number, since 2×78384868² = 12288375062754848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78384869) 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, 75513 + ... + 76543.

It is an arithmetic number, because the mean of its divisors is an integer number (5815320).

Almost surely, 2^78384868 is an apocalyptic number.

It is an amenable number.

78384868 is a deficient number, since it is larger than the sum of its proper divisors (61182812).

78384868 is a wasteful number, since it uses less digits than its factorization.

78384868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347 (or 1345 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 52.

The square root of 78384868 is about 8853.5229146369. The cubic root of 78384868 is about 427.9674546540.

The spelling of 78384868 in words is "seventy-eight million, three hundred eighty-four thousand, eight hundred sixty-eight".