71855020 has 12 divisors (see below), whose sum is σ = 150895584. Its totient is φ = 28742000.

The previous prime is 71854997. The next prime is 71855029. The reversal of 71855020 is 2055817.

It is a self number, because there is not a number n which added to its sum of digits gives 71855020.

It is not an unprimeable number, because it can be changed into a prime (71855029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1796356 + ... + 1796395.

It is an arithmetic number, because the mean of its divisors is an integer number (12574632).

Almost surely, 2^71855020 is an apocalyptic number.

It is an amenable number.

71855020 is an abundant number, since it is smaller than the sum of its proper divisors (79040564).

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

71855020 is a wasteful number, since it uses less digits than its factorization.

71855020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3592760 (or 3592758 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 71855020 is about 8476.7340408910. The cubic root of 71855020 is about 415.7373449857.

The spelling of 71855020 in words is "seventy-one million, eight hundred fifty-five thousand, twenty".