1642844 has 24 divisors (see below), whose sum is σ = 3429888. Its totient is φ = 673200.

The previous prime is 1642843. The next prime is 1642847. The reversal of 1642844 is 4482461.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632 + ... + 1919.

It is an arithmetic number, because the mean of its divisors is an integer number (142912).

2^1642844 is an apocalyptic number.

1642844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1642844 is an abundant number, since it is smaller than the sum of its proper divisors (1787044).

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

1642844 is a wasteful number, since it uses less digits than its factorization.

1642844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585 (or 2583 counting only the distinct ones).

The product of its digits is 6144, while the sum is 29.

The square root of 1642844 is about 1281.7347619535. The cubic root of 1642844 is about 117.9954992059.

The spelling of 1642844 in words is "one million, six hundred forty-two thousand, eight hundred forty-four".