78345407 has 8 divisors (see below), whose sum is σ = 89609856. Its totient is φ = 67099032.

The previous prime is 78345403. The next prime is 78345413. The reversal of 78345407 is 70454387.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78345407 - 2² = 78345403 is a prime.

It is a super-2 number, since 2×78345407² = 12276005595991298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78345403) 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 7 ways as a sum of consecutive naturals, for example, 6608 + ... + 14154.

It is an arithmetic number, because the mean of its divisors is an integer number (11201232).

Almost surely, 2^78345407 is an apocalyptic number.

78345407 is a deficient number, since it is larger than the sum of its proper divisors (11264449).

78345407 is a wasteful number, since it uses less digits than its factorization.

78345407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9037.

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 78345407 is about 8851.2940861775. The cubic root of 78345407 is about 427.8956259158.

The spelling of 78345407 in words is "seventy-eight million, three hundred forty-five thousand, four hundred seven".