71949744 has 60 divisors (see below), whose sum is σ = 204685312. Its totient is φ = 23587200.

The previous prime is 71949743. The next prime is 71949781. The reversal of 71949744 is 44794917.

It is a self number, because there is not a number n which added to its sum of digits gives 71949744.

It is not an unprimeable number, because it can be changed into a prime (71949743) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4689 + ... + 12879.

Almost surely, 2^71949744 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 71949744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102342656).

71949744 is an abundant number, since it is smaller than the sum of its proper divisors (132735568).

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

71949744 is a wasteful number, since it uses less digits than its factorization.

71949744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8266 (or 8257 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 71949744 is about 8482.3194941007. The cubic root of 71949744 is about 415.9199488472.

The spelling of 71949744 in words is "seventy-one million, nine hundred forty-nine thousand, seven hundred forty-four".