71287084 has 12 divisors (see below), whose sum is σ = 136093608. Its totient is φ = 32403200.

The previous prime is 71287063. The next prime is 71287087. The reversal of 71287084 is 48078217.

It is not an unprimeable number, because it can be changed into a prime (71287087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810037 + ... + 810124.

It is an arithmetic number, because the mean of its divisors is an integer number (11341134).

Almost surely, 2^71287084 is an apocalyptic number.

It is an amenable number.

71287084 is a deficient number, since it is larger than the sum of its proper divisors (64806524).

71287084 is a wasteful number, since it uses less digits than its factorization.

71287084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620176 (or 1620174 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 71287084 is about 8443.1678888910. The cubic root of 71287084 is about 414.6391288783.

The spelling of 71287084 in words is "seventy-one million, two hundred eighty-seven thousand, eighty-four".