71438649 has 8 divisors (see below), whose sum is σ = 95305632. Its totient is φ = 47598720.

The previous prime is 71438617. The next prime is 71438669. The reversal of 71438649 is 94683417.

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

It is not a de Polignac number, because 71438649 - 2⁵ = 71438617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71438649.

It is not an unprimeable number, because it can be changed into a prime (71438669) 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, 522 + ... + 11964.

It is an arithmetic number, because the mean of its divisors is an integer number (11913204).

Almost surely, 2^71438649 is an apocalyptic number.

It is an amenable number.

71438649 is a deficient number, since it is larger than the sum of its proper divisors (23866983).

71438649 is a wasteful number, since it uses less digits than its factorization.

71438649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13527.

The product of its digits is 145152, while the sum is 42.

The square root of 71438649 is about 8452.1387234238. The cubic root of 71438649 is about 414.9327785832.

The spelling of 71438649 in words is "seventy-one million, four hundred thirty-eight thousand, six hundred forty-nine".