471990138 has 16 divisors (see below), whose sum is σ = 976531680. Its totient is φ = 151904816.

The previous prime is 471990067. The next prime is 471990139. The reversal of 471990138 is 831099174.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 471990138.

It is not an unprimeable number, because it can be changed into a prime (471990139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1356120 + ... + 1356467.

It is an arithmetic number, because the mean of its divisors is an integer number (61033230).

Almost surely, 2^471990138 is an apocalyptic number.

471990138 is an abundant number, since it is smaller than the sum of its proper divisors (504541542).

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

471990138 is a wasteful number, since it uses less digits than its factorization.

471990138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712621.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 471990138 is about 21725.3340135428. The cubic root of 471990138 is about 778.5938604348.

The spelling of 471990138 in words is "four hundred seventy-one million, nine hundred ninety thousand, one hundred thirty-eight".