1536644 has 12 divisors (see below), whose sum is σ = 2830800. Its totient is φ = 727848.

The previous prime is 1536643. The next prime is 1536649. The reversal of 1536644 is 4466351.

It is a happy number.

It is a super-2 number, since 2×1536644² = 4722549565472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1536641) 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, 10034 + ... + 10185.

It is an arithmetic number, because the mean of its divisors is an integer number (235900).

2^1536644 is an apocalyptic number.

It is an amenable number.

1536644 is a deficient number, since it is larger than the sum of its proper divisors (1294156).

1536644 is a wasteful number, since it uses less digits than its factorization.

1536644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20242 (or 20240 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 1536644 is about 1239.6144561919. The cubic root of 1536644 is about 115.3960885230.

It can be divided in two parts, 153664 and 4, that multiplied together give a 4-th power (614656 = 28⁴).

The spelling of 1536644 in words is "one million, five hundred thirty-six thousand, six hundred forty-four".