71640826 has 8 divisors (see below), whose sum is σ = 108504864. Its totient is φ = 35472540.

The previous prime is 71640797. The next prime is 71640847. The reversal of 71640826 is 62804617.

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

It is a junction number, because it is equal to n+sod(n) for n = 71640791 and 71640800.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173680 + ... + 174091.

It is an arithmetic number, because the mean of its divisors is an integer number (13563108).

Almost surely, 2^71640826 is an apocalyptic number.

71640826 is a deficient number, since it is larger than the sum of its proper divisors (36864038).

71640826 is a wasteful number, since it uses less digits than its factorization.

71640826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347876.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 71640826 is about 8464.0903823152. The cubic root of 71640826 is about 415.3238407111.

The spelling of 71640826 in words is "seventy-one million, six hundred forty thousand, eight hundred twenty-six".