1669438354 has 8 divisors (see below), whose sum is σ = 2504368188. Its totient is φ = 834648960.

The previous prime is 1669438343. The next prime is 1669438357. The reversal of 1669438354 is 4538349661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1625944329 + 43494025 = 40323^2 + 6595^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1669438298 and 1669438307.

It is not an unprimeable number, because it can be changed into a prime (1669438357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2794 + ... + 57850.

Almost surely, 2^1669438354 is an apocalyptic number.

1669438354 is a deficient number, since it is larger than the sum of its proper divisors (834929834).

1669438354 is a wasteful number, since it uses less digits than its factorization.

1669438354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70220.

The product of its digits is 1866240, while the sum is 49.

The square root of 1669438354 is about 40858.7610433797. The cubic root of 1669438354 is about 1186.2879772415.

The spelling of 1669438354 in words is "one billion, six hundred sixty-nine million, four hundred thirty-eight thousand, three hundred fifty-four".