1688294492 has 6 divisors (see below), whose sum is σ = 2954515368. Its totient is φ = 844147244.

The previous prime is 1688294477. The next prime is 1688294501. The reversal of 1688294492 is 2944928861.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 211036808 + ... + 211036815.

It is an arithmetic number, because the mean of its divisors is an integer number (492419228).

Almost surely, 2^1688294492 is an apocalyptic number.

It is an amenable number.

1688294492 is a deficient number, since it is larger than the sum of its proper divisors (1266220876).

1688294492 is a wasteful number, since it uses less digits than its factorization.

1688294492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422073627 (or 422073625 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 53.

The square root of 1688294492 is about 41088.8609236129. The cubic root of 1688294492 is about 1190.7376007633.

The spelling of 1688294492 in words is "one billion, six hundred eighty-eight million, two hundred ninety-four thousand, four hundred ninety-two".