71049744 has 80 divisors (see below), whose sum is σ = 205393600. Its totient is φ = 23514624.

The previous prime is 71049673. The next prime is 71049751. The reversal of 71049744 is 44794017.

It is a super-2 number, since 2×71049744² = 10096132244931072, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 71049699 and 71049708.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69912 + ... + 70920.

It is an arithmetic number, because the mean of its divisors is an integer number (2567420).

Almost surely, 2^71049744 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 71049744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102696800).

71049744 is an abundant number, since it is smaller than the sum of its proper divisors (134343856).

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

71049744 is a wasteful number, since it uses less digits than its factorization.

71049744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189 (or 1177 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 71049744 is about 8429.1010196818. The cubic root of 71049744 is about 414.1784569855.

The spelling of 71049744 in words is "seventy-one million, forty-nine thousand, seven hundred forty-four".