1630044 has 84 divisors (see below), whose sum is σ = 4713016. Its totient is φ = 489888.

The previous prime is 1630021. The next prime is 1630049. The reversal of 1630044 is 4400361.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1629999 and 1630026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 37887 + ... + 37929.

2^1630044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1630044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2356508).

1630044 is an abundant number, since it is smaller than the sum of its proper divisors (3082972).

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

1630044 is a wasteful number, since it uses less digits than its factorization.

1630044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1630044 is about 1276.7317650940. The cubic root of 1630044 is about 117.6882511245.

The spelling of 1630044 in words is "one million, six hundred thirty thousand, forty-four".