1851648 has 36 divisors (see below), whose sum is σ = 4930128. Its totient is φ = 616960.

The previous prime is 1851643. The next prime is 1851649. The reversal of 1851648 is 8461581.

It is not an unprimeable number, because it can be changed into a prime (1851643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438 + ... + 1973.

It is an arithmetic number, because the mean of its divisors is an integer number (136948).

2^1851648 is an apocalyptic number.

It is an amenable number.

1851648 is an abundant number, since it is smaller than the sum of its proper divisors (3078480).

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

1851648 is an equidigital number, since it uses as much as digits as its factorization.

1851648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430 (or 2416 counting only the distinct ones).

The product of its digits is 7680, while the sum is 33.

The square root of 1851648 is about 1360.7527328652. The cubic root of 1851648 is about 122.7965438095.

The spelling of 1851648 in words is "one million, eight hundred fifty-one thousand, six hundred forty-eight".