1840636 has 18 divisors (see below), whose sum is σ = 3747408. Its totient is φ = 788760.

The previous prime is 1840633. The next prime is 1840649. The reversal of 1840636 is 6360481.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1840633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4500 + ... + 4891.

2^1840636 is an apocalyptic number.

It is an amenable number.

1840636 is an abundant number, since it is smaller than the sum of its proper divisors (1906772).

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

1840636 is a wasteful number, since it uses less digits than its factorization.

1840636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9409 (or 9400 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1840636 is about 1356.7004090808. The cubic root of 1840636 is about 122.5526304460.

The spelling of 1840636 in words is "one million, eight hundred forty thousand, six hundred thirty-six".