1609536 has 56 divisors (see below), whose sum is σ = 4352544. Its totient is φ = 524800.

The previous prime is 1609523. The next prime is 1609549. The reversal of 1609536 is 6359061.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1609523) and next prime (1609549).

It is a super-2 number, since 2×1609536² = 5181212270592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15886 + ... + 15986.

It is an arithmetic number, because the mean of its divisors is an integer number (77724).

2^1609536 is an apocalyptic number.

1609536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1609536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2176272).

1609536 is an abundant number, since it is smaller than the sum of its proper divisors (2743008).

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

1609536 is a wasteful number, since it uses less digits than its factorization.

1609536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 1609536 is about 1268.6748992551. The cubic root of 1609536 is about 117.1926113682.

It can be divided in two parts, 1609 and 536, that added together give a triangular number (2145 = T₆₅).

The spelling of 1609536 in words is "one million, six hundred nine thousand, five hundred thirty-six".