71672638 has 8 divisors (see below), whose sum is σ = 107678088. Its totient is φ = 35779944.

The previous prime is 71672609. The next prime is 71672683. The reversal of 71672638 is 83627617.

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

It is a self number, because there is not a number n which added to its sum of digits gives 71672638.

It is a congruent number.

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, 26581 + ... + 29152.

It is an arithmetic number, because the mean of its divisors is an integer number (13459761).

Almost surely, 2^71672638 is an apocalyptic number.

71672638 is a deficient number, since it is larger than the sum of its proper divisors (36005450).

71672638 is a wasteful number, since it uses less digits than its factorization.

71672638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56378.

The product of its digits is 84672, while the sum is 40.

The square root of 71672638 is about 8465.9694069846. The cubic root of 71672638 is about 415.3853062543.

The spelling of 71672638 in words is "seventy-one million, six hundred seventy-two thousand, six hundred thirty-eight".