78404043 has 4 divisors (see below), whose sum is σ = 104538728. Its totient is φ = 52269360.

The previous prime is 78404021. The next prime is 78404059. The reversal of 78404043 is 34040487.

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

It is not a de Polignac number, because 78404043 - 2⁹ = 78403531 is a prime.

It is a super-2 number, since 2×78404043² = 12294387917491698, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78404043.

It is not an unprimeable number, because it can be changed into a prime (78404063) 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, 13067338 + ... + 13067343.

It is an arithmetic number, because the mean of its divisors is an integer number (26134682).

Almost surely, 2^78404043 is an apocalyptic number.

78404043 is a deficient number, since it is larger than the sum of its proper divisors (26134685).

78404043 is a wasteful number, since it uses less digits than its factorization.

78404043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26134684.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 78404043 is about 8854.6057506814. The cubic root of 78404043 is about 428.0023491734.

The spelling of 78404043 in words is "seventy-eight million, four hundred four thousand, forty-three".