71905870 has 16 divisors (see below), whose sum is σ = 130148928. Its totient is φ = 28602720.

The previous prime is 71905853. The next prime is 71905871. The reversal of 71905870 is 7850917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71905871) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 18054 + ... + 21673.

It is an arithmetic number, because the mean of its divisors is an integer number (8134308).

Almost surely, 2^71905870 is an apocalyptic number.

71905870 is a deficient number, since it is larger than the sum of its proper divisors (58243058).

71905870 is a wasteful number, since it uses less digits than its factorization.

71905870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39915.

The product of its (nonzero) digits is 17640, while the sum is 37.

The square root of 71905870 is about 8479.7328967368. The cubic root of 71905870 is about 415.8353908339.

The spelling of 71905870 in words is "seventy-one million, nine hundred five thousand, eight hundred seventy".