71884780 has 48 divisors (see below), whose sum is σ = 165632544. Its totient is φ = 25989120.

The previous prime is 71884763. The next prime is 71884783. The reversal of 71884780 is 8748817.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (71884783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41614 + ... + 43306.

It is an arithmetic number, because the mean of its divisors is an integer number (3450678).

Almost surely, 2^71884780 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 71884780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82816272).

71884780 is an abundant number, since it is smaller than the sum of its proper divisors (93747764).

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

71884780 is a wasteful number, since it uses less digits than its factorization.

71884780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906 (or 1904 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 43.

The square root of 71884780 is about 8478.4892522194. The cubic root of 71884780 is about 415.7947320024.

The spelling of 71884780 in words is "seventy-one million, eight hundred eighty-four thousand, seven hundred eighty".