78276347 has 4 divisors (see below), whose sum is σ = 82880856. Its totient is φ = 73671840.

The previous prime is 78276311. The next prime is 78276379. The reversal of 78276347 is 74367287.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78276347 - 2⁸ = 78276091 is a prime.

It is a super-2 number, since 2×78276347² = 12254372999328818, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78276298 and 78276307.

It is not an unprimeable number, because it can be changed into a prime (78276647) 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, 2302229 + ... + 2302262.

It is an arithmetic number, because the mean of its divisors is an integer number (20720214).

Almost surely, 2^78276347 is an apocalyptic number.

78276347 is a deficient number, since it is larger than the sum of its proper divisors (4604509).

78276347 is a wasteful number, since it uses less digits than its factorization.

78276347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4604508.

The product of its digits is 395136, while the sum is 44.

The square root of 78276347 is about 8847.3921016309. The cubic root of 78276347 is about 427.7698616452.

The spelling of 78276347 in words is "seventy-eight million, two hundred seventy-six thousand, three hundred forty-seven".