1690856474 has 16 divisors (see below), whose sum is σ = 2671531200. Its totient is φ = 800404704.

The previous prime is 1690856473. The next prime is 1690856491. The reversal of 1690856474 is 4746580961.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1690856471) 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 7 ways as a sum of consecutive naturals, for example, 47222 + ... + 74910.

It is an arithmetic number, because the mean of its divisors is an integer number (166970700).

Almost surely, 2^1690856474 is an apocalyptic number.

1690856474 is a deficient number, since it is larger than the sum of its proper divisors (980674726).

1690856474 is a wasteful number, since it uses less digits than its factorization.

1690856474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29317.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 1690856474 is about 41120.0252188639. The cubic root of 1690856474 is about 1191.3396099699.

The spelling of 1690856474 in words is "one billion, six hundred ninety million, eight hundred fifty-six thousand, four hundred seventy-four".