71744436 has 36 divisors (see below), whose sum is σ = 181627264. Its totient is φ = 23878800.

The previous prime is 71744423. The next prime is 71744461. The reversal of 71744436 is 63444717.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 71744436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34671 + ... + 36681.

Almost surely, 2^71744436 is an apocalyptic number.

It is an amenable number.

71744436 is an abundant number, since it is smaller than the sum of its proper divisors (109882828).

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

71744436 is a wasteful number, since it uses less digits than its factorization.

71744436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3012 (or 3007 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 71744436 is about 8470.2087341458. The cubic root of 71744436 is about 415.5239639156.

The spelling of 71744436 in words is "seventy-one million, seven hundred forty-four thousand, four hundred thirty-six".