471131640 has 160 divisors (see below), whose sum is σ = 1809830880. Its totient is φ = 107682048.

The previous prime is 471131567. The next prime is 471131641. The reversal of 471131640 is 46131174.

It is a happy number.

471131640 is a `hidden beast` number, since 4 + 7 + 1 + 13 + 1 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (471131641) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12294 + ... + 33066.

It is an arithmetic number, because the mean of its divisors is an integer number (11311443).

Almost surely, 2^471131640 is an apocalyptic number.

471131640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 471131640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (904915440).

471131640 is an abundant number, since it is smaller than the sum of its proper divisors (1338699240).

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

471131640 is a wasteful number, since it uses less digits than its factorization.

471131640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20803 (or 20790 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 471131640 is about 21705.5670278387. The cubic root of 471131640 is about 778.1215151535.

The spelling of 471131640 in words is "four hundred seventy-one million, one hundred thirty-one thousand, six hundred forty".