1669790840 has 16 divisors (see below), whose sum is σ = 3757029480. Its totient is φ = 667916320.

The previous prime is 1669790833. The next prime is 1669790861. The reversal of 1669790840 is 480979661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20872346 + ... + 20872425.

Almost surely, 2^1669790840 is an apocalyptic number.

1669790840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1669790840 is an abundant number, since it is smaller than the sum of its proper divisors (2087238640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1669790840 is a wasteful number, since it uses less digits than its factorization.

1669790840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41744782 (or 41744778 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 1669790840 is about 40863.0742847378. The cubic root of 1669790840 is about 1186.3714625001.

The spelling of 1669790840 in words is "one billion, six hundred sixty-nine million, seven hundred ninety thousand, eight hundred forty".