71811492 has 24 divisors (see below), whose sum is σ = 167714400. Its totient is φ = 23915136.

The previous prime is 71811491. The next prime is 71811499. The reversal of 71811492 is 29411817.

It is not an unprimeable number, because it can be changed into a prime (71811491) 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 7 ways as a sum of consecutive naturals, for example, 15859 + ... + 19877.

It is an arithmetic number, because the mean of its divisors is an integer number (6988100).

Almost surely, 2^71811492 is an apocalyptic number.

It is an amenable number.

71811492 is an abundant number, since it is smaller than the sum of its proper divisors (95902908).

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

71811492 is a wasteful number, since it uses less digits than its factorization.

71811492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5515 (or 5513 counting only the distinct ones).

The product of its digits is 4032, while the sum is 33.

The square root of 71811492 is about 8474.1661536696. The cubic root of 71811492 is about 415.6533802167.

The spelling of 71811492 in words is "seventy-one million, eight hundred eleven thousand, four hundred ninety-two".