1881904 has 10 divisors (see below), whose sum is σ = 3646220. Its totient is φ = 940944.

The previous prime is 1881899. The next prime is 1881907. The reversal of 1881904 is 4091881.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1881907) 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 as a sum of consecutive naturals, namely, 58794 + ... + 58825.

It is an arithmetic number, because the mean of its divisors is an integer number (364622).

2^1881904 is an apocalyptic number.

It is an amenable number.

1881904 is a deficient number, since it is larger than the sum of its proper divisors (1764316).

1881904 is a wasteful number, since it uses less digits than its factorization.

1881904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117627 (or 117621 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1881904 is about 1371.8250617335. The cubic root of 1881904 is about 123.4617670283.

The spelling of 1881904 in words is "one million, eight hundred eighty-one thousand, nine hundred four".