71488724 has 12 divisors (see below), whose sum is σ = 125630400. Its totient is φ = 35594328.

The previous prime is 71488721. The next prime is 71488751. The reversal of 71488724 is 42788417.

It is a happy number.

It is a super-2 number, since 2×71488724² = 10221275318296352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71488721) 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 3 ways as a sum of consecutive naturals, for example, 36434 + ... + 38345.

It is an arithmetic number, because the mean of its divisors is an integer number (10469200).

Almost surely, 2^71488724 is an apocalyptic number.

It is an amenable number.

71488724 is a deficient number, since it is larger than the sum of its proper divisors (54141676).

71488724 is a wasteful number, since it uses less digits than its factorization.

71488724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75022 (or 75020 counting only the distinct ones).

The product of its digits is 100352, while the sum is 41.

The square root of 71488724 is about 8455.1004724959. The cubic root of 71488724 is about 415.0297051365.

The spelling of 71488724 in words is "seventy-one million, four hundred eighty-eight thousand, seven hundred twenty-four".