1669356 has 96 divisors (see below), whose sum is σ = 4939200. Its totient is φ = 483840.

The previous prime is 1669351. The next prime is 1669357. The reversal of 1669356 is 6539661.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1669356.

It is not an unprimeable number, because it can be changed into a prime (1669351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40696 + ... + 40736.

It is an arithmetic number, because the mean of its divisors is an integer number (51450).

2^1669356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1669356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2469600).

1669356 is an abundant number, since it is smaller than the sum of its proper divisors (3269844).

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

1669356 is a wasteful number, since it uses less digits than its factorization.

1669356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 88 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 1669356 is about 1292.0356032246. The cubic root of 1669356 is about 118.6268470249.

It can be divided in two parts, 1669 and 356, that added together give a square (2025 = 45²).

The spelling of 1669356 in words is "one million, six hundred sixty-nine thousand, three hundred fifty-six".