71634870 has 24 divisors (see below), whose sum is σ = 186250896. Its totient is φ = 19102608.

The previous prime is 71634869. The next prime is 71634877. The reversal of 71634870 is 7843617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71634877) 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 11 ways as a sum of consecutive naturals, for example, 397882 + ... + 398061.

It is an arithmetic number, because the mean of its divisors is an integer number (7760454).

Almost surely, 2^71634870 is an apocalyptic number.

71634870 is an abundant number, since it is smaller than the sum of its proper divisors (114616026).

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

71634870 is a wasteful number, since it uses less digits than its factorization.

71634870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795956 (or 795953 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 71634870 is about 8463.7385356591. The cubic root of 71634870 is about 415.3123308059.

The spelling of 71634870 in words is "seventy-one million, six hundred thirty-four thousand, eight hundred seventy".