1881538 has 8 divisors (see below), whose sum is σ = 2945088. Its totient is φ = 899844.

The previous prime is 1881533. The next prime is 1881559. The reversal of 1881538 is 8351881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1881533) 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 3 ways as a sum of consecutive naturals, for example, 20406 + ... + 20497.

It is an arithmetic number, because the mean of its divisors is an integer number (368136).

2^1881538 is an apocalyptic number.

1881538 is a deficient number, since it is larger than the sum of its proper divisors (1063550).

1881538 is a wasteful number, since it uses less digits than its factorization.

1881538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40928.

The product of its digits is 7680, while the sum is 34.

The square root of 1881538 is about 1371.6916563135. The cubic root of 1881538 is about 123.4537627347.

The spelling of 1881538 in words is "one million, eight hundred eighty-one thousand, five hundred thirty-eight".