1669338738 has 48 divisors (see below), whose sum is σ = 3646188000. Its totient is φ = 551960640.

The previous prime is 1669338719. The next prime is 1669338751. The reversal of 1669338738 is 8378339661.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1590838 + ... + 1591886.

It is an arithmetic number, because the mean of its divisors is an integer number (75962250).

Almost surely, 2^1669338738 is an apocalyptic number.

1669338738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1669338738 is an abundant number, since it is smaller than the sum of its proper divisors (1976849262).

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

1669338738 is a wasteful number, since it uses less digits than its factorization.

1669338738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687 (or 1684 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 1669338738 is about 40857.5419965519. The cubic root of 1669338738 is about 1186.2643813590.

The spelling of 1669338738 in words is "one billion, six hundred sixty-nine million, three hundred thirty-eight thousand, seven hundred thirty-eight".