71773960 has 16 divisors (see below), whose sum is σ = 161491500. Its totient is φ = 28709568.

The previous prime is 71773937. The next prime is 71773967. The reversal of 71773960 is 6937717.

It can be written as a sum of positive squares in 2 ways, for example, as 71537764 + 236196 = 8458^2 + 486^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1794349 = 71773960 / (7 + 1 + 7 + 7 + 3 + 9 + 6 + 0).

It is not an unprimeable number, because it can be changed into a prime (71773967) 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, 897135 + ... + 897214.

Almost surely, 2^71773960 is an apocalyptic number.

It is an amenable number.

71773960 is an abundant number, since it is smaller than the sum of its proper divisors (89717540).

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

71773960 is a wasteful number, since it uses less digits than its factorization.

71773960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794360 (or 1794356 counting only the distinct ones).

The product of its (nonzero) digits is 55566, while the sum is 40.

The square root of 71773960 is about 8471.9513690767. The cubic root of 71773960 is about 415.5809543842.

The spelling of 71773960 in words is "seventy-one million, seven hundred seventy-three thousand, nine hundred sixty".