78340345 has 8 divisors (see below), whose sum is σ = 94063176. Its totient is φ = 62635776.

The previous prime is 78340319. The next prime is 78340351. The reversal of 78340345 is 54304387.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 144 + 78340201 = 12^2 + 8851^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 78340345 - 2¹¹ = 78338297 is a prime.

It is a super-2 number, since 2×78340345² = 12274419309438050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78340345.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8049 + ... + 14881.

It is an arithmetic number, because the mean of its divisors is an integer number (11757897).

Almost surely, 2^78340345 is an apocalyptic number.

It is an amenable number.

78340345 is a deficient number, since it is larger than the sum of its proper divisors (15722831).

78340345 is a wasteful number, since it uses less digits than its factorization.

78340345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9131.

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

The square root of 78340345 is about 8851.0081346703. The cubic root of 78340345 is about 427.8864100839.

The spelling of 78340345 in words is "seventy-eight million, three hundred forty thousand, three hundred forty-five".