1687263490 has 16 divisors (see below), whose sum is σ = 3313172160. Its totient is φ = 613550320.

The previous prime is 1687263467. The next prime is 1687263491. The reversal of 1687263490 is 943627861.

It is a self number, because there is not a number n which added to its sum of digits gives 1687263490.

It is not an unprimeable number, because it can be changed into a prime (1687263491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7669270 + ... + 7669489.

It is an arithmetic number, because the mean of its divisors is an integer number (207073260).

Almost surely, 2^1687263490 is an apocalyptic number.

1687263490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1687263490 is a deficient number, since it is larger than the sum of its proper divisors (1625908670).

1687263490 is a wasteful number, since it uses less digits than its factorization.

1687263490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15338777.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 1687263490 is about 41076.3130039686. The cubic root of 1687263490 is about 1190.4951661963.

The spelling of 1687263490 in words is "one billion, six hundred eighty-seven million, two hundred sixty-three thousand, four hundred ninety".