71804560 has 20 divisors (see below), whose sum is σ = 166945788. Its totient is φ = 28721792.

The previous prime is 71804527. The next prime is 71804567. The reversal of 71804560 is 6540817.

It can be written as a sum of positive squares in 2 ways, for example, as 12082576 + 59721984 = 3476^2 + 7728^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (71804567) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 448699 + ... + 448858.

Almost surely, 2^71804560 is an apocalyptic number.

It is an amenable number.

71804560 is an abundant number, since it is smaller than the sum of its proper divisors (95141228).

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

71804560 is a wasteful number, since it uses less digits than its factorization.

71804560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897570 (or 897564 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 71804560 is about 8473.7571360053. The cubic root of 71804560 is about 415.6400053753.

The spelling of 71804560 in words is "seventy-one million, eight hundred four thousand, five hundred sixty".