78405343 has 16 divisors (see below), whose sum is σ = 88715520. Its totient is φ = 68846976.

The previous prime is 78405323. The next prime is 78405347. The reversal of 78405343 is 34350487.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 78405343 - 2⁵ = 78405311 is a prime.

It is a super-2 number, since 2×78405343² = 12294795621895298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78405299 and 78405308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78405347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19830 + ... + 23452.

It is an arithmetic number, because the mean of its divisors is an integer number (5544720).

Almost surely, 2^78405343 is an apocalyptic number.

78405343 is a deficient number, since it is larger than the sum of its proper divisors (10310177).

78405343 is a wasteful number, since it uses less digits than its factorization.

78405343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3726.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 78405343 is about 8854.6791585015. The cubic root of 78405343 is about 428.0047146975.

The spelling of 78405343 in words is "seventy-eight million, four hundred five thousand, three hundred forty-three".