71144748 has 18 divisors (see below), whose sum is σ = 179838204. Its totient is φ = 23714904.

The previous prime is 71144729. The next prime is 71144761. The reversal of 71144748 is 84744117.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1976243 = 71144748 / (7 + 1 + 1 + 4 + 4 + 7 + 4 + 8).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 988086 + ... + 988157.

Almost surely, 2^71144748 is an apocalyptic number.

It is an amenable number.

71144748 is an abundant number, since it is smaller than the sum of its proper divisors (108693456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71144748 is a wasteful number, since it uses less digits than its factorization.

71144748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976253 (or 1976248 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 71144748 is about 8434.7346134896. The cubic root of 71144748 is about 414.3629806851.

The spelling of 71144748 in words is "seventy-one million, one hundred forty-four thousand, seven hundred forty-eight".