1840812636 has 48 divisors (see below), whose sum is σ = 4826755584. Its totient is φ = 541776576.

The previous prime is 1840812593. The next prime is 1840812703. The reversal of 1840812636 is 6362180481.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 1840812594 and 1840812603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252936 + ... + 260111.

It is an arithmetic number, because the mean of its divisors is an integer number (100557408).

Almost surely, 2^1840812636 is an apocalyptic number.

It is an amenable number.

1840812636 is an abundant number, since it is smaller than the sum of its proper divisors (2985942948).

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

1840812636 is a wasteful number, since it uses less digits than its factorization.

1840812636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513090 (or 513088 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 1840812636 is about 42904.6924706378. The cubic root of 1840812636 is about 1225.5655056097.

The spelling of 1840812636 in words is "one billion, eight hundred forty million, eight hundred twelve thousand, six hundred thirty-six".