71673620 has 12 divisors (see below), whose sum is σ = 150514644. Its totient is φ = 28669440.

The previous prime is 71673599. The next prime is 71673653. The reversal of 71673620 is 2637617.

It can be written as a sum of positive squares in 2 ways, for example, as 51351556 + 20322064 = 7166^2 + 4508^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1791821 + ... + 1791860.

It is an arithmetic number, because the mean of its divisors is an integer number (12542887).

Almost surely, 2^71673620 is an apocalyptic number.

It is an amenable number.

71673620 is an abundant number, since it is smaller than the sum of its proper divisors (78841024).

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

71673620 is a wasteful number, since it uses less digits than its factorization.

71673620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583690 (or 3583688 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 71673620 is about 8466.0274036882. The cubic root of 71673620 is about 415.3872033359.

The spelling of 71673620 in words is "seventy-one million, six hundred seventy-three thousand, six hundred twenty".