471921638 has 8 divisors (see below), whose sum is σ = 707997288. Its totient is φ = 235922544.

The previous prime is 471921629. The next prime is 471921661. The reversal of 471921638 is 836129174.

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 = 471921595 and 471921604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170 + ... + 30722.

It is an arithmetic number, because the mean of its divisors is an integer number (88499661).

Almost surely, 2^471921638 is an apocalyptic number.

471921638 is a deficient number, since it is larger than the sum of its proper divisors (236075650).

471921638 is a wasteful number, since it uses less digits than its factorization.

471921638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38278.

The product of its digits is 72576, while the sum is 41.

The square root of 471921638 is about 21723.7574558362. The cubic root of 471921638 is about 778.5561927977.

The spelling of 471921638 in words is "four hundred seventy-one million, nine hundred twenty-one thousand, six hundred thirty-eight".