1864044 has 72 divisors (see below), whose sum is σ = 5809440. Its totient is φ = 490752.

The previous prime is 1864043. The next prime is 1864069. The reversal of 1864044 is 4404681.

1864044 is a `hidden beast` number, since 18 + 640 + 4 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1863999 and 1864017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1864043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2992 + ... + 3560.

2^1864044 is an apocalyptic number.

1864044 is a gapful number since it is divisible by the number (14) 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 1864044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2904720).

1864044 is an abundant number, since it is smaller than the sum of its proper divisors (3945396).

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

1864044 is a wasteful number, since it uses less digits than its factorization.

1864044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 1864044 is about 1365.2999670402. The cubic root of 1864044 is about 123.0699582197.

The spelling of 1864044 in words is "one million, eight hundred sixty-four thousand, forty-four".