78385336 has 16 divisors (see below), whose sum is σ = 154708200. Its totient is φ = 37129824.

The previous prime is 78385313. The next prime is 78385339. The reversal of 78385336 is 63358387.

It is a super-2 number, since 2×78385336² = 12288521799665792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78385292 and 78385301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78385339) 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, 257695 + ... + 257998.

Almost surely, 2^78385336 is an apocalyptic number.

78385336 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

78385336 is a deficient number, since it is larger than the sum of its proper divisors (76322864).

78385336 is a wasteful number, since it uses less digits than its factorization.

78385336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515718 (or 515714 counting only the distinct ones).

The product of its digits is 362880, while the sum is 43.

The square root of 78385336 is about 8853.5493447543. The cubic root of 78385336 is about 427.9683063846.

The spelling of 78385336 in words is "seventy-eight million, three hundred eighty-five thousand, three hundred thirty-six".