71918870 has 16 divisors (see below), whose sum is σ = 131228640. Its totient is φ = 28373184.

The previous prime is 71918867. The next prime is 71918881. The reversal of 71918870 is 7881917.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 48530 + ... + 49989.

It is an arithmetic number, because the mean of its divisors is an integer number (8201790).

Almost surely, 2^71918870 is an apocalyptic number.

71918870 is a deficient number, since it is larger than the sum of its proper divisors (59309770).

71918870 is a wasteful number, since it uses less digits than its factorization.

71918870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98599.

The product of its (nonzero) digits is 28224, while the sum is 41.

The square root of 71918870 is about 8480.4993956724. The cubic root of 71918870 is about 415.8604492161.

It can be divided in two parts, 7191 and 8870, that added together give a palindrome (16061).

The spelling of 71918870 in words is "seventy-one million, nine hundred eighteen thousand, eight hundred seventy".