485491680 has 144 divisors (see below), whose sum is σ = 1684204704. Its totient is φ = 127319040.

The previous prime is 485491649. The next prime is 485491687. The reversal of 485491680 is 86194584.

485491680 is a `hidden beast` number, since 4 + 85 + 491 + 6 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (485491687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85077 + ... + 90603.

It is an arithmetic number, because the mean of its divisors is an integer number (11695866).

Almost surely, 2^485491680 is an apocalyptic number.

485491680 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 485491680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (842102352).

485491680 is an abundant number, since it is smaller than the sum of its proper divisors (1198713024).

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

485491680 is a wasteful number, since it uses less digits than its factorization.

485491680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609 (or 5598 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 485491680 is about 22033.8757371462. The cubic root of 485491680 is about 785.9482125039.

The spelling of 485491680 in words is "four hundred eighty-five million, four hundred ninety-one thousand, six hundred eighty".