71139748 has 12 divisors (see below), whose sum is σ = 124716592. Its totient is φ = 35506440.

The previous prime is 71139721. The next prime is 71139749. The reversal of 71139748 is 84793117.

It is a self number, because there is not a number n which added to its sum of digits gives 71139748.

It is not an unprimeable number, because it can be changed into a prime (71139749) 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 3 ways as a sum of consecutive naturals, for example, 13290 + ... + 17857.

Almost surely, 2^71139748 is an apocalyptic number.

It is an amenable number.

71139748 is a deficient number, since it is larger than the sum of its proper divisors (53576844).

71139748 is a wasteful number, since it uses less digits than its factorization.

71139748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31722 (or 31720 counting only the distinct ones).

The product of its digits is 42336, while the sum is 40.

The square root of 71139748 is about 8434.4382148428. The cubic root of 71139748 is about 414.3532734169.

It can be divided in two parts, 7113 and 9748, that added together give a palindrome (16861).

The spelling of 71139748 in words is "seventy-one million, one hundred thirty-nine thousand, seven hundred forty-eight".