71996544 has 48 divisors (see below), whose sum is σ = 207180870. Its totient is φ = 23998464.

The previous prime is 71996543. The next prime is 71996549. The reversal of 71996544 is 44569917.

71996544 is a `hidden beast` number, since 7 + 19 + 96 + 544 = 666.

It can be written as a sum of positive squares in only one way, i.e., 64641600 + 7354944 = 8040^2 + 2712^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 71996544.

It is not an unprimeable number, because it can be changed into a prime (71996543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30097 + ... + 32400.

Almost surely, 2^71996544 is an apocalyptic number.

It is an amenable number.

71996544 is an abundant number, since it is smaller than the sum of its proper divisors (135184326).

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

71996544 is a wasteful number, since it uses less digits than its factorization.

71996544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62517 (or 62502 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 71996544 is about 8485.0777250418. The cubic root of 71996544 is about 416.0101082356.

The spelling of 71996544 in words is "seventy-one million, nine hundred ninety-six thousand, five hundred forty-four".