1826536644 has 81 divisors (see below), whose sum is σ = 4916381197. Its totient is φ = 571663488.

The previous prime is 1826536639. The next prime is 1826536669. The reversal of 1826536644 is 4466356281.

The square root of 1826536644 is 42738.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1422044100 + 404492544 = 37710^2 + 20112^2 .

It is a super-2 number, since 2×1826536644² = 6672472223749565472, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1826536644.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4359067 + ... + 4359485.

Almost surely, 2^1826536644 is an apocalyptic number.

1826536644 is the 42738-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1826536644

1826536644 is an abundant number, since it is smaller than the sum of its proper divisors (3089844553).

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

1826536644 is a wasteful number, since it uses less digits than its factorization.

1826536644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882 (or 441 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The cubic root of 1826536644 is about 1222.3890844959.

The spelling of 1826536644 in words is "one billion, eight hundred twenty-six million, five hundred thirty-six thousand, six hundred forty-four".