1687482720 has 960 divisors, whose sum is σ = 7903526400. Its totient is φ = 328458240.

The previous prime is 1687482707. The next prime is 1687482721. The reversal of 1687482720 is 272847861.

1687482720 is a `hidden beast` number, since 168 + 7 + 482 + 7 + 2 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687482721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 18960436 + ... + 18960524.

It is an arithmetic number, because the mean of its divisors is an integer number (8232840).

Almost surely, 2^1687482720 is an apocalyptic number.

1687482720 is a gapful number since it is divisible by the number (10) 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 1687482720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3951763200).

1687482720 is an abundant number, since it is smaller than the sum of its proper divisors (6216043680).

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

1687482720 is a wasteful number, since it uses less digits than its factorization.

1687482720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 1687482720 is about 41078.9814868869. The cubic root of 1687482720 is about 1190.5467252156.

The spelling of 1687482720 in words is "one billion, six hundred eighty-seven million, four hundred eighty-two thousand, seven hundred twenty".