71445860 has 24 divisors (see below), whose sum is σ = 150297336. Its totient is φ = 28528640.

The previous prime is 71445859. The next prime is 71445893. The reversal of 71445860 is 6854417.

It can be written as a sum of positive squares in 4 ways, for example, as 4990756 + 66455104 = 2234^2 + 8152^2 .

It is a super-2 number, since 2×71445860² = 10209021822279200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71445860.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10034 + ... + 15606.

It is an arithmetic number, because the mean of its divisors is an integer number (6262389).

Almost surely, 2^71445860 is an apocalyptic number.

It is an amenable number.

71445860 is an abundant number, since it is smaller than the sum of its proper divisors (78851476).

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

71445860 is a wasteful number, since it uses less digits than its factorization.

71445860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6223 (or 6221 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 71445860 is about 8452.5652910818. The cubic root of 71445860 is about 414.9467391851.

The spelling of 71445860 in words is "seventy-one million, four hundred forty-five thousand, eight hundred sixty".