71945870 has 32 divisors (see below), whose sum is σ = 138565728. Its totient is φ = 26800128.

The previous prime is 71945869. The next prime is 71945891. The reversal of 71945870 is 7854917.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 14309 + ... + 18671.

It is an arithmetic number, because the mean of its divisors is an integer number (4330179).

Almost surely, 2^71945870 is an apocalyptic number.

71945870 is a deficient number, since it is larger than the sum of its proper divisors (66619858).

71945870 is a wasteful number, since it uses less digits than its factorization.

71945870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4484.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 71945870 is about 8482.0911336769. The cubic root of 71945870 is about 415.9124839015.

The spelling of 71945870 in words is "seventy-one million, nine hundred forty-five thousand, eight hundred seventy".