71529890 has 16 divisors (see below), whose sum is σ = 129170808. Its totient is φ = 28519296.

The previous prime is 71529883. The next prime is 71529893. The reversal of 71529890 is 9892517.

It can be written as a sum of positive squares in 4 ways, for example, as 21077281 + 50452609 = 4591^2 + 7103^2 .

It is not an unprimeable number, because it can be changed into a prime (71529893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8297 + ... + 14556.

Almost surely, 2^71529890 is an apocalyptic number.

71529890 is a deficient number, since it is larger than the sum of its proper divisors (57640918).

71529890 is a wasteful number, since it uses less digits than its factorization.

71529890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23173.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 71529890 is about 8457.5345107188. The cubic root of 71529890 is about 415.1093532894.

The spelling of 71529890 in words is "seventy-one million, five hundred twenty-nine thousand, eight hundred ninety".