71670140 has 24 divisors (see below), whose sum is σ = 155363712. Its totient is φ = 27743040.

The previous prime is 71670133. The next prime is 71670167. The reversal of 71670140 is 4107617.

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 7 ways as a sum of consecutive naturals, for example, 57179 + ... + 58418.

It is an arithmetic number, because the mean of its divisors is an integer number (6473488).

Almost surely, 2^71670140 is an apocalyptic number.

It is an amenable number.

71670140 is an abundant number, since it is smaller than the sum of its proper divisors (83693572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71670140 is a wasteful number, since it uses less digits than its factorization.

71670140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115637 (or 115635 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 71670140 is about 8465.8218738643. The cubic root of 71670140 is about 415.3804804027.

Adding to 71670140 its reverse (4107617), we get a palindrome (75777757).

The spelling of 71670140 in words is "seventy-one million, six hundred seventy thousand, one hundred forty".