71880570 has 48 divisors (see below), whose sum is σ = 189967752. Its totient is φ = 18852480.

The previous prime is 71880541. The next prime is 71880577. The reversal of 71880570 is 7508817.

71880570 is a `hidden beast` number, since 7 + 1 + 8 + 80 + 570 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 53450721 + 18429849 = 7311^2 + 4293^2 .

It is a Smith number, since the sum of its digits (36) 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 (71880577) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1057 + ... + 12036.

Almost surely, 2^71880570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71880570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94983876).

71880570 is an abundant number, since it is smaller than the sum of its proper divisors (118087182).

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

71880570 is a wasteful number, since it uses less digits than its factorization.

71880570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13167 (or 13164 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

The square root of 71880570 is about 8478.2409732208. The cubic root of 71880570 is about 415.7866147070.

The spelling of 71880570 in words is "seventy-one million, eight hundred eighty thousand, five hundred seventy".