78470847 has 24 divisors (see below), whose sum is σ = 139505184. Its totient is φ = 41390784.

The previous prime is 78470803. The next prime is 78470849. The reversal of 78470847 is 74807487.

It is not a de Polignac number, because 78470847 - 2⁶ = 78470783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78470849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47088 + ... + 48725.

It is an arithmetic number, because the mean of its divisors is an integer number (5812716).

Almost surely, 2^78470847 is an apocalyptic number.

78470847 is a deficient number, since it is larger than the sum of its proper divisors (61034337).

78470847 is a wasteful number, since it uses less digits than its factorization.

78470847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95839 (or 95836 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The square root of 78470847 is about 8858.3772215909. The cubic root of 78470847 is about 428.1238741654.

It can be divided in two parts, 784 and 70847, that added together give a triangular number (71631 = T₃₇₈).

The spelling of 78470847 in words is "seventy-eight million, four hundred seventy thousand, eight hundred forty-seven".