71878461 has 8 divisors (see below), whose sum is σ = 97462560. Its totient is φ = 47106672.

The previous prime is 71878459. The next prime is 71878489. The reversal of 71878461 is 16487817.

It is a happy number.

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

It is not a de Polignac number, because 71878461 - 2¹ = 71878459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71878421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202870 + ... + 203223.

It is an arithmetic number, because the mean of its divisors is an integer number (12182820).

Almost surely, 2^71878461 is an apocalyptic number.

It is an amenable number.

71878461 is a deficient number, since it is larger than the sum of its proper divisors (25584099).

71878461 is a wasteful number, since it uses less digits than its factorization.

71878461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406155.

The product of its digits is 75264, while the sum is 42.

The square root of 71878461 is about 8478.1165950935. The cubic root of 71878461 is about 415.7825482277.

The spelling of 71878461 in words is "seventy-one million, eight hundred seventy-eight thousand, four hundred sixty-one".