71240736 has 48 divisors (see below), whose sum is σ = 213724224. Its totient is φ = 20354304.

The previous prime is 71240731. The next prime is 71240753. The reversal of 71240736 is 63704217.

It is a tau number, because it is divible by the number of its divisors (48).

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (71240731) 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, 52335 + ... + 53678.

It is an arithmetic number, because the mean of its divisors is an integer number (4452588).

Almost surely, 2^71240736 is an apocalyptic number.

It is an amenable number.

71240736 is an abundant number, since it is smaller than the sum of its proper divisors (142483488).

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

71240736 is a wasteful number, since it uses less digits than its factorization.

71240736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106033 (or 106025 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 71240736 is about 8440.4227382282. The cubic root of 71240736 is about 414.5492488251.

The spelling of 71240736 in words is "seventy-one million, two hundred forty thousand, seven hundred thirty-six".