78363816 has 16 divisors (see below), whose sum is σ = 195909600. Its totient is φ = 26121264.

The previous prime is 78363811. The next prime is 78363827. The reversal of 78363816 is 61836387.

It is a super-2 number, since 2×78363816² = 12281775316163712, 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 (78363811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1632556 + ... + 1632603.

It is an arithmetic number, because the mean of its divisors is an integer number (12244350).

Almost surely, 2^78363816 is an apocalyptic number.

It is an amenable number.

78363816 is an abundant number, since it is smaller than the sum of its proper divisors (117545784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78363816 is a wasteful number, since it uses less digits than its factorization.

78363816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265168 (or 3265164 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 78363816 is about 8852.3339295352. Note that the first 3 decimals coincide. The cubic root of 78363816 is about 427.9291378301.

It can be divided in two parts, 7836381 and 6, that added together give a palindrome (7836387).

The spelling of 78363816 in words is "seventy-eight million, three hundred sixty-three thousand, eight hundred sixteen".