71325840 has 40 divisors (see below), whose sum is σ = 221110848. Its totient is φ = 19020160.

The previous prime is 71325811. The next prime is 71325841. The reversal of 71325840 is 4852317.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 71325798 and 71325807.

It is not an unprimeable number, because it can be changed into a prime (71325841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148356 + ... + 148835.

Almost surely, 2^71325840 is an apocalyptic number.

It is an amenable number.

71325840 is an abundant number, since it is smaller than the sum of its proper divisors (149785008).

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

71325840 is a wasteful number, since it uses less digits than its factorization.

71325840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297207 (or 297201 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 71325840 is about 8445.4626871475. The cubic root of 71325840 is about 414.7142562921.

The spelling of 71325840 in words is "seventy-one million, three hundred twenty-five thousand, eight hundred forty".