71440207 has 8 divisors (see below), whose sum is σ = 72069120. Its totient is φ = 70814520.

The previous prime is 71440189. The next prime is 71440217. The reversal of 71440207 is 70204417.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71440207 is a prime.

It is a super-4 number, since 4×71440207⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71440217) 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, 64218 + ... + 65320.

It is an arithmetic number, because the mean of its divisors is an integer number (9008640).

Almost surely, 2^71440207 is an apocalyptic number.

71440207 is a deficient number, since it is larger than the sum of its proper divisors (628913).

71440207 is a wasteful number, since it uses less digits than its factorization.

71440207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 71440207 is about 8452.2308889429. The cubic root of 71440207 is about 414.9357949737.

The spelling of 71440207 in words is "seventy-one million, four hundred forty thousand, two hundred seven".