1690047866 has 16 divisors (see below), whose sum is σ = 2848777344. Its totient is φ = 746107824.

The previous prime is 1690047857. The next prime is 1690047871. The reversal of 1690047866 is 6687400961.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1690047866.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1412486 + ... + 1413681.

It is an arithmetic number, because the mean of its divisors is an integer number (178048584).

Almost surely, 2^1690047866 is an apocalyptic number.

1690047866 is a deficient number, since it is larger than the sum of its proper divisors (1158729478).

1690047866 is a wasteful number, since it uses less digits than its factorization.

1690047866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2826205.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 1690047866 is about 41110.1917533840. The cubic root of 1690047866 is about 1191.1496706587.

The spelling of 1690047866 in words is "one billion, six hundred ninety million, forty-seven thousand, eight hundred sixty-six".