78040143 has 6 divisors (see below), whose sum is σ = 112724664. Its totient is φ = 52026756.

The previous prime is 78040121. The next prime is 78040153. The reversal of 78040143 is 34104087.

It is not a de Polignac number, because 78040143 - 2⁵ = 78040111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78040153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4335555 + ... + 4335572.

It is an arithmetic number, because the mean of its divisors is an integer number (18787444).

Almost surely, 2^78040143 is an apocalyptic number.

78040143 is a deficient number, since it is larger than the sum of its proper divisors (34684521).

78040143 is a wasteful number, since it uses less digits than its factorization.

78040143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8671133 (or 8671130 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 78040143 is about 8834.0332238452. The cubic root of 78040143 is about 427.3391536065.

The spelling of 78040143 in words is "seventy-eight million, forty thousand, one hundred forty-three".