71849812 has 24 divisors (see below), whose sum is σ = 128113832. Its totient is φ = 35251200.

The previous prime is 71849809. The next prime is 71849851. The reversal of 71849812 is 21894817.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22905796 + 48944016 = 4786^2 + 6996^2 .

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 7 ways as a sum of consecutive naturals, for example, 69862 + ... + 70882.

Almost surely, 2^71849812 is an apocalyptic number.

It is an amenable number.

71849812 is a deficient number, since it is larger than the sum of its proper divisors (56264020).

71849812 is a wasteful number, since it uses less digits than its factorization.

71849812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339 (or 1337 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 71849812 is about 8476.4268415412. The cubic root of 71849812 is about 415.7273006287.

The spelling of 71849812 in words is "seventy-one million, eight hundred forty-nine thousand, eight hundred twelve".