1609956 has 30 divisors (see below), whose sum is σ = 4209590. Its totient is φ = 536544.

The previous prime is 1609913. The next prime is 1609969. The reversal of 1609956 is 6599061.

It can be written as a sum of positive squares in only one way, i.e., 1166400 + 443556 = 1080^2 + 666^2 .

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 1609956.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2161 + ... + 2808.

2^1609956 is an apocalyptic number.

It is an amenable number.

1609956 is an abundant number, since it is smaller than the sum of its proper divisors (2599634).

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

1609956 is a wasteful number, since it uses less digits than its factorization.

1609956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985 (or 4974 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 1609956 is about 1268.8404154976. The cubic root of 1609956 is about 117.2028040813.

The spelling of 1609956 in words is "one million, six hundred nine thousand, nine hundred fifty-six".