1881788 has 6 divisors (see below), whose sum is σ = 3293136. Its totient is φ = 940892.

The previous prime is 1881787. The next prime is 1881799. The reversal of 1881788 is 8871881.

It is a super-2 number, since 2×1881788² = 7082252153888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881787) 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 as a sum of consecutive naturals, namely, 235220 + ... + 235227.

It is an arithmetic number, because the mean of its divisors is an integer number (548856).

2^1881788 is an apocalyptic number.

It is an amenable number.

1881788 is a deficient number, since it is larger than the sum of its proper divisors (1411348).

1881788 is a wasteful number, since it uses less digits than its factorization.

1881788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470451 (or 470449 counting only the distinct ones).

The product of its digits is 28672, while the sum is 41.

The square root of 1881788 is about 1371.7827816386. The cubic root of 1881788 is about 123.4592302607.

The spelling of 1881788 in words is "one million, eight hundred eighty-one thousand, seven hundred eighty-eight".