71540136 has 48 divisors (see below), whose sum is σ = 194494560. Its totient is φ = 23755680.

The previous prime is 71540123. The next prime is 71540137. The reversal of 71540136 is 63104517.

It is not an unprimeable number, because it can be changed into a prime (71540137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18621 + ... + 22131.

It is an arithmetic number, because the mean of its divisors is an integer number (4051970).

Almost surely, 2^71540136 is an apocalyptic number.

It is an amenable number.

71540136 is an abundant number, since it is smaller than the sum of its proper divisors (122954424).

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

71540136 is a wasteful number, since it uses less digits than its factorization.

71540136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3806 (or 3799 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 71540136 is about 8458.1402211124. The cubic root of 71540136 is about 415.1291725443.

The spelling of 71540136 in words is "seventy-one million, five hundred forty thousand, one hundred thirty-six".