71747020 has 48 divisors (see below), whose sum is σ = 157264128. Its totient is φ = 27463680.

The previous prime is 71747003. The next prime is 71747023. The reversal of 71747020 is 2074717.

It is a self number, because there is not a number n which added to its sum of digits gives 71747020.

It is not an unprimeable number, because it can be changed into a prime (71747023) 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, 59544 + ... + 60736.

It is an arithmetic number, because the mean of its divisors is an integer number (3276336).

Almost surely, 2^71747020 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 71747020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78632064).

71747020 is an abundant number, since it is smaller than the sum of its proper divisors (85517108).

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

71747020 is a wasteful number, since it uses less digits than its factorization.

71747020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330 (or 1328 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 71747020 is about 8470.3612673841. The cubic root of 71747020 is about 415.5289524606.

The spelling of 71747020 in words is "seventy-one million, seven hundred forty-seven thousand, twenty".