78104427 has 16 divisors (see below), whose sum is σ = 105418368. Its totient is φ = 51434240.

The previous prime is 78104417. The next prime is 78104431. The reversal of 78104427 is 72440187.

It is a cyclic number.

It is not a de Polignac number, because 78104427 - 2⁶ = 78104363 is a prime.

It is a super-2 number, since 2×78104427² = 12200603033996658, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (78104417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138448 + ... + 139010.

It is an arithmetic number, because the mean of its divisors is an integer number (6588648).

Almost surely, 2^78104427 is an apocalyptic number.

78104427 is a deficient number, since it is larger than the sum of its proper divisors (27313941).

78104427 is a wasteful number, since it uses less digits than its factorization.

78104427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050.

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 78104427 is about 8837.6709035809. The cubic root of 78104427 is about 427.4564587507.

The spelling of 78104427 in words is "seventy-eight million, one hundred four thousand, four hundred twenty-seven".