76638143 has 8 divisors (see below), whose sum is σ = 79796976. Its totient is φ = 73540800.

The previous prime is 76638131. The next prime is 76638173. The reversal of 76638143 is 34183667.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76638143 - 2¹⁴ = 76621759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76638097 and 76638106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76638103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12821 + ... + 17822.

It is an arithmetic number, because the mean of its divisors is an integer number (9974622).

Almost surely, 2^76638143 is an apocalyptic number.

76638143 is a deficient number, since it is larger than the sum of its proper divisors (3158833).

76638143 is a wasteful number, since it uses less digits than its factorization.

76638143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30745.

The product of its digits is 72576, while the sum is 38.

The square root of 76638143 is about 8754.3213900336. The cubic root of 76638143 is about 424.7646087502.

The spelling of 76638143 in words is "seventy-six million, six hundred thirty-eight thousand, one hundred forty-three".