71745780 has 96 divisors (see below), whose sum is σ = 219663360. Its totient is φ = 17418240.

The previous prime is 71745761. The next prime is 71745799. The reversal of 71745780 is 8754717.

It is an interprime number because it is at equal distance from previous prime (71745761) and next prime (71745799).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30486 + ... + 32754.

It is an arithmetic number, because the mean of its divisors is an integer number (2288160).

Almost surely, 2^71745780 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 71745780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109831680).

71745780 is an abundant number, since it is smaller than the sum of its proper divisors (147917580).

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

71745780 is a wasteful number, since it uses less digits than its factorization.

71745780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329 (or 2327 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 39.

The square root of 71745780 is about 8470.2880706621. The cubic root of 71745780 is about 415.5265585917.

The spelling of 71745780 in words is "seventy-one million, seven hundred forty-five thousand, seven hundred eighty".