71544396 has 72 divisors (see below), whose sum is σ = 209735680. Its totient is φ = 18580320.

The previous prime is 71544383. The next prime is 71544401. The reversal of 71544396 is 69344517.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6645 + ... + 13683.

Almost surely, 2^71544396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71544396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104867840).

71544396 is an abundant number, since it is smaller than the sum of its proper divisors (138191284).

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

71544396 is a wasteful number, since it uses less digits than its factorization.

71544396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7075 (or 7062 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 71544396 is about 8458.3920457732. The cubic root of 71544396 is about 415.1374122788.

It can be divided in two parts, 7 and 1544396, that added together give a triangular number (1544403 = T₁₇₅₇).

The spelling of 71544396 in words is "seventy-one million, five hundred forty-four thousand, three hundred ninety-six".