71052640 has 24 divisors (see below), whose sum is σ = 167862240. Its totient is φ = 28420992.

The previous prime is 71052637. The next prime is 71052671. The reversal of 71052640 is 4625017.

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 3 ways as a sum of consecutive naturals, for example, 221880 + ... + 222199.

It is an arithmetic number, because the mean of its divisors is an integer number (6994260).

Almost surely, 2^71052640 is an apocalyptic number.

It is an amenable number.

71052640 is an abundant number, since it is smaller than the sum of its proper divisors (96809600).

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

71052640 is a wasteful number, since it uses less digits than its factorization.

71052640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444094 (or 444086 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 71052640 is about 8429.2728037477. The cubic root of 71052640 is about 414.1840842379.

Adding to 71052640 its reverse (4625017), we get a palindrome (75677657).

The spelling of 71052640 in words is "seventy-one million, fifty-two thousand, six hundred forty".