71378872 has 8 divisors (see below), whose sum is σ = 133835400. Its totient is φ = 35689432.

The previous prime is 71378843. The next prime is 71378873. The reversal of 71378872 is 27887317.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71378873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4461172 + ... + 4461187.

It is an arithmetic number, because the mean of its divisors is an integer number (16729425).

Almost surely, 2^71378872 is an apocalyptic number.

It is an amenable number.

71378872 is a deficient number, since it is larger than the sum of its proper divisors (62456528).

71378872 is a wasteful number, since it uses less digits than its factorization.

71378872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8922365 (or 8922361 counting only the distinct ones).

The product of its digits is 131712, while the sum is 43.

The square root of 71378872 is about 8448.6017778092. The cubic root of 71378872 is about 414.8170132450.

The spelling of 71378872 in words is "seventy-one million, three hundred seventy-eight thousand, eight hundred seventy-two".