71640622 has 8 divisors (see below), whose sum is σ = 107683056. Its totient is φ = 35746272.

The previous prime is 71640587. The next prime is 71640629. The reversal of 71640622 is 22604617.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71640629) by changing a digit.

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, 35803 + ... + 37750.

It is an arithmetic number, because the mean of its divisors is an integer number (13460382).

Almost surely, 2^71640622 is an apocalyptic number.

71640622 is a deficient number, since it is larger than the sum of its proper divisors (36042434).

71640622 is a wasteful number, since it uses less digits than its factorization.

71640622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74042.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 71640622 is about 8464.0783313956. The cubic root of 71640622 is about 415.3234464938.

The spelling of 71640622 in words is "seventy-one million, six hundred forty thousand, six hundred twenty-two".