71557340 has 24 divisors (see below), whose sum is σ = 152516112. Its totient is φ = 28195200.

The previous prime is 71557337. The next prime is 71557349. The reversal of 71557340 is 4375517.

It is a junction number, because it is equal to n+sod(n) for n = 71557297 and 71557306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71557349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25361 + ... + 28040.

It is an arithmetic number, because the mean of its divisors is an integer number (6354838).

Almost surely, 2^71557340 is an apocalyptic number.

It is an amenable number.

71557340 is an abundant number, since it is smaller than the sum of its proper divisors (80958772).

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

71557340 is a wasteful number, since it uses less digits than its factorization.

71557340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53477 (or 53475 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 71557340 is about 8459.1571684181. The cubic root of 71557340 is about 415.1624466860.

The spelling of 71557340 in words is "seventy-one million, five hundred fifty-seven thousand, three hundred forty".