71523040 has 24 divisors (see below), whose sum is σ = 168973560. Its totient is φ = 28609152.

The previous prime is 71523007. The next prime is 71523041. The reversal of 71523040 is 4032517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71523041) 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, 223350 + ... + 223669.

It is an arithmetic number, because the mean of its divisors is an integer number (7040565).

Almost surely, 2^71523040 is an apocalyptic number.

It is an amenable number.

71523040 is an abundant number, since it is smaller than the sum of its proper divisors (97450520).

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

71523040 is a wasteful number, since it uses less digits than its factorization.

71523040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447034 (or 447026 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 71523040 is about 8457.1295366690. The cubic root of 71523040 is about 415.0961019999.

Adding to 71523040 its reverse (4032517), we get a palindrome (75555557).

The spelling of 71523040 in words is "seventy-one million, five hundred twenty-three thousand, forty".