78427935 has 12 divisors (see below), whose sum is σ = 135941832. Its totient is φ = 41828208.

The previous prime is 78427931. The next prime is 78428017. The reversal of 78427935 is 53972487.

It is not a de Polignac number, because 78427935 - 2² = 78427931 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1742843 = 78427935 / (7 + 8 + 4 + 2 + 7 + 9 + 3 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78427931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 871377 + ... + 871466.

It is an arithmetic number, because the mean of its divisors is an integer number (11328486).

Almost surely, 2^78427935 is an apocalyptic number.

78427935 is a deficient number, since it is larger than the sum of its proper divisors (57513897).

78427935 is a wasteful number, since it uses less digits than its factorization.

78427935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742854 (or 1742851 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 78427935 is about 8855.9547763073. The cubic root of 78427935 is about 428.0458196935.

The spelling of 78427935 in words is "seventy-eight million, four hundred twenty-seven thousand, nine hundred thirty-five".