71444780 has 96 divisors (see below), whose sum is σ = 171908352. Its totient is φ = 24710400.

The previous prime is 71444773. The next prime is 71444783. The reversal of 71444780 is 8744417.

It is a self number, because there is not a number n which added to its sum of digits gives 71444780.

It is not an unprimeable number, because it can be changed into a prime (71444783) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 545315 + ... + 545445.

It is an arithmetic number, because the mean of its divisors is an integer number (1790712).

Almost surely, 2^71444780 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 71444780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85954176).

71444780 is an abundant number, since it is smaller than the sum of its proper divisors (100463572).

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

71444780 is a wasteful number, since it uses less digits than its factorization.

71444780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 71444780 is about 8452.5014049097. The cubic root of 71444780 is about 414.9446483490.

The spelling of 71444780 in words is "seventy-one million, four hundred forty-four thousand, seven hundred eighty".