71500040 has 32 divisors (see below), whose sum is σ = 169344000. Its totient is φ = 27094464.

The previous prime is 71500027. The next prime is 71500057. The reversal of 71500040 is 4000517.

It is a happy number.

It is a super-2 number, since 2×71500040² = 10224511440003200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71499991 and 71500018.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46280 + ... + 47799.

It is an arithmetic number, because the mean of its divisors is an integer number (5292000).

Almost surely, 2^71500040 is an apocalyptic number.

It is an amenable number.

71500040 is an abundant number, since it is smaller than the sum of its proper divisors (97843960).

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

71500040 is a wasteful number, since it uses less digits than its factorization.

71500040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94109 (or 94105 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 71500040 is about 8455.7696278931. The cubic root of 71500040 is about 415.0516024283.

Adding to 71500040 its reverse (4000517), we get a palindrome (75500557).

The spelling of 71500040 in words is "seventy-one million, five hundred thousand, forty".