1687261228 has 12 divisors (see below), whose sum is σ = 2960934480. Its totient is φ = 841279952.

The previous prime is 1687261207. The next prime is 1687261241. The reversal of 1687261228 is 8221627861.

It is a happy number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 586051 + ... + 588922.

It is an arithmetic number, because the mean of its divisors is an integer number (246744540).

Almost surely, 2^1687261228 is an apocalyptic number.

It is an amenable number.

1687261228 is a deficient number, since it is larger than the sum of its proper divisors (1273673252).

1687261228 is a wasteful number, since it uses less digits than its factorization.

1687261228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175336 (or 1175334 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 1687261228 is about 41076.2854698426. The cubic root of 1687261228 is about 1190.4946341906.

The spelling of 1687261228 in words is "one billion, six hundred eighty-seven million, two hundred sixty-one thousand, two hundred twenty-eight".