471668138 has 8 divisors (see below), whose sum is σ = 715451940. Its totient is φ = 233184160.

The previous prime is 471668101. The next prime is 471668143. The reversal of 471668138 is 831866174.

It can be written as a sum of positive squares in 2 ways, for example, as 352050169 + 119617969 = 18763^2 + 10937^2 .

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

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, 1324733 + ... + 1325088.

Almost surely, 2^471668138 is an apocalyptic number.

471668138 is a deficient number, since it is larger than the sum of its proper divisors (243783802).

471668138 is a wasteful number, since it uses less digits than its factorization.

471668138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649912.

The product of its digits is 193536, while the sum is 44.

The square root of 471668138 is about 21717.9220460890. The cubic root of 471668138 is about 778.4167633327.

The spelling of 471668138 in words is "four hundred seventy-one million, six hundred sixty-eight thousand, one hundred thirty-eight".