71297670 has 32 divisors (see below), whose sum is σ = 172258560. Its totient is φ = 18885600.

The previous prime is 71297657. The next prime is 71297693. The reversal of 71297670 is 7679217.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3340 + ... + 12399.

It is an arithmetic number, because the mean of its divisors is an integer number (5383080).

Almost surely, 2^71297670 is an apocalyptic number.

71297670 is an abundant number, since it is smaller than the sum of its proper divisors (100960890).

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

71297670 is a wasteful number, since it uses less digits than its factorization.

71297670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15900.

The product of its (nonzero) digits is 37044, while the sum is 39.

The square root of 71297670 is about 8443.7947630198. The cubic root of 71297670 is about 414.6596522434.

The spelling of 71297670 in words is "seventy-one million, two hundred ninety-seven thousand, six hundred seventy".