1669309040 has 40 divisors (see below), whose sum is σ = 4435594080. Its totient is φ = 572334336.

The previous prime is 1669309021. The next prime is 1669309051. The reversal of 1669309040 is 409039661.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1669308985 and 1669309003.

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 7 ways as a sum of consecutive naturals, for example, 1489895 + ... + 1491014.

It is an arithmetic number, because the mean of its divisors is an integer number (110889852).

Almost surely, 2^1669309040 is an apocalyptic number.

1669309040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1669309040 is an abundant number, since it is smaller than the sum of its proper divisors (2766285040).

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

1669309040 is a wasteful number, since it uses less digits than its factorization.

1669309040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980929 (or 2980923 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 1669309040 is about 40857.1785614230. The cubic root of 1669309040 is about 1186.2573466596.

The spelling of 1669309040 in words is "one billion, six hundred sixty-nine million, three hundred nine thousand, forty".