71156340 has 48 divisors (see below), whose sum is σ = 221376960. Its totient is φ = 18974880.

The previous prime is 71156321. The next prime is 71156341. The reversal of 71156340 is 4365117.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71156341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65346 + ... + 66425.

It is an arithmetic number, because the mean of its divisors is an integer number (4612020).

Almost surely, 2^71156340 is an apocalyptic number.

It is an amenable number.

71156340 is an abundant number, since it is smaller than the sum of its proper divisors (150220620).

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

71156340 is a wasteful number, since it uses less digits than its factorization.

71156340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131789 (or 131781 counting only the distinct ones).

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

The square root of 71156340 is about 8435.4217440505. The cubic root of 71156340 is about 414.3854842662.

The spelling of 71156340 in words is "seventy-one million, one hundred fifty-six thousand, three hundred forty".