72478143 has 6 divisors (see below), whose sum is σ = 104690664. Its totient is φ = 48318756.

The previous prime is 72478139. The next prime is 72478169. The reversal of 72478143 is 34187427.

It is a happy number.

It is not a de Polignac number, because 72478143 - 2² = 72478139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72478098 and 72478107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72478193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4026555 + ... + 4026572.

It is an arithmetic number, because the mean of its divisors is an integer number (17448444).

Almost surely, 2^72478143 is an apocalyptic number.

72478143 is a deficient number, since it is larger than the sum of its proper divisors (32212521).

72478143 is a wasteful number, since it uses less digits than its factorization.

72478143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8053133 (or 8053130 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 72478143 is about 8513.4095989797. The cubic root of 72478143 is about 416.9356386702.

The spelling of 72478143 in words is "seventy-two million, four hundred seventy-eight thousand, one hundred forty-three".