78349305 has 8 divisors (see below), whose sum is σ = 125358912. Its totient is φ = 41786288.

The previous prime is 78349303. The next prime is 78349321. The reversal of 78349305 is 50394387.

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 78349305 - 2¹ = 78349303 is a prime.

It is a super-2 number, since 2×78349305² = 12277227187966050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78349303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2611629 + ... + 2611658.

It is an arithmetic number, because the mean of its divisors is an integer number (15669864).

Almost surely, 2^78349305 is an apocalyptic number.

It is an amenable number.

78349305 is a deficient number, since it is larger than the sum of its proper divisors (47009607).

78349305 is a wasteful number, since it uses less digits than its factorization.

78349305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5223295.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 78349305 is about 8851.5142772296. The cubic root of 78349305 is about 427.9027223093.

The spelling of 78349305 in words is "seventy-eight million, three hundred forty-nine thousand, three hundred five".