71228649 has 8 divisors (see below), whose sum is σ = 95179392. Its totient is φ = 47381840.

The previous prime is 71228627. The next prime is 71228659. The reversal of 71228649 is 94682217.

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

It is a cyclic number.

It is not a de Polignac number, because 71228649 - 2⁵ = 71228617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71228609) 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, 24369 + ... + 27134.

It is an arithmetic number, because the mean of its divisors is an integer number (11897424).

Almost surely, 2^71228649 is an apocalyptic number.

It is an amenable number.

71228649 is a deficient number, since it is larger than the sum of its proper divisors (23950743).

71228649 is a wasteful number, since it uses less digits than its factorization.

71228649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51967.

The product of its digits is 48384, while the sum is 39.

The square root of 71228649 is about 8439.7066892162. The cubic root of 71228649 is about 414.5258027816.

The spelling of 71228649 in words is "seventy-one million, two hundred twenty-eight thousand, six hundred forty-nine".