71149784 has 16 divisors (see below), whose sum is σ = 133585200. Its totient is φ = 35527072.

The previous prime is 71149781. The next prime is 71149807. The reversal of 71149784 is 48794117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71149781) 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, 797 + ... + 11955.

It is an arithmetic number, because the mean of its divisors is an integer number (8349075).

Almost surely, 2^71149784 is an apocalyptic number.

It is an amenable number.

71149784 is a deficient number, since it is larger than the sum of its proper divisors (62435416).

71149784 is a wasteful number, since it uses less digits than its factorization.

71149784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11962 (or 11958 counting only the distinct ones).

The product of its digits is 56448, while the sum is 41.

The square root of 71149784 is about 8435.0331356788. The cubic root of 71149784 is about 414.3727573858.

The spelling of 71149784 in words is "seventy-one million, one hundred forty-nine thousand, seven hundred eighty-four".