487471644 has 72 divisors (see below), whose sum is σ = 1348663680. Its totient is φ = 147232800.

The previous prime is 487471609. The next prime is 487471661. The reversal of 487471644 is 446174784.

It is a happy number.

487471644 is a `hidden beast` number, since 487 + 4 + 7 + 164 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 487471644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129217 + ... + 132935.

It is an arithmetic number, because the mean of its divisors is an integer number (18731440).

Almost surely, 2^487471644 is an apocalyptic number.

487471644 is a gapful number since it is divisible by the number (44) 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 487471644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674331840).

487471644 is an abundant number, since it is smaller than the sum of its proper divisors (861192036).

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

487471644 is a wasteful number, since it uses less digits than its factorization.

487471644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4071 (or 4066 counting only the distinct ones).

The product of its digits is 602112, while the sum is 45.

The square root of 487471644 is about 22078.7600195301. The cubic root of 487471644 is about 787.0151985083.

The spelling of 487471644 in words is "four hundred eighty-seven million, four hundred seventy-one thousand, six hundred forty-four".