78404107 has 4 divisors (see below), whose sum is σ = 78525936. Its totient is φ = 78282280.

The previous prime is 78404101. The next prime is 78404113. The reversal of 78404107 is 70140487.

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

It is an interprime number because it is at equal distance from previous prime (78404101) and next prime (78404113).

It is a cyclic number.

It is not a de Polignac number, because 78404107 - 2³ = 78404099 is a prime.

It is a super-2 number, since 2×78404107² = 12294407988934898, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78404101) 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, 59944 + ... + 61237.

It is an arithmetic number, because the mean of its divisors is an integer number (19631484).

Almost surely, 2^78404107 is an apocalyptic number.

78404107 is a deficient number, since it is larger than the sum of its proper divisors (121829).

78404107 is a wasteful number, since it uses less digits than its factorization.

78404107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121828.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 78404107 is about 8854.6093646191. The cubic root of 78404107 is about 428.0024656305.

The spelling of 78404107 in words is "seventy-eight million, four hundred four thousand, one hundred seven".