71864090 has 16 divisors (see below), whose sum is σ = 129463272. Its totient is φ = 28721664.

The previous prime is 71864077. The next prime is 71864119. The reversal of 71864090 is 9046817.

It can be written as a sum of positive squares in 4 ways, for example, as 28079401 + 43784689 = 5299^2 + 6617^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71864090.

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 7 ways as a sum of consecutive naturals, for example, 14402 + ... + 18738.

Almost surely, 2^71864090 is an apocalyptic number.

71864090 is a deficient number, since it is larger than the sum of its proper divisors (57599182).

71864090 is a wasteful number, since it uses less digits than its factorization.

71864090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6001.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 71864090 is about 8477.2690177910. The cubic root of 71864090 is about 415.7548365916.

The spelling of 71864090 in words is "seventy-one million, eight hundred sixty-four thousand, ninety".