1881540988 has 6 divisors (see below), whose sum is σ = 3292696736. Its totient is φ = 940770492.

The previous prime is 1881540971. The next prime is 1881541003. The reversal of 1881540988 is 8890451881.

It is a super-2 number, since 2×1881540988² = 7080392979048032288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 235192620 + ... + 235192627.

Almost surely, 2^1881540988 is an apocalyptic number.

It is an amenable number.

1881540988 is a deficient number, since it is larger than the sum of its proper divisors (1411155748).

1881540988 is a wasteful number, since it uses less digits than its factorization.

1881540988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470385251 (or 470385249 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 52.

The square root of 1881540988 is about 43376.7332564360. The cubic root of 1881540988 is about 1234.5382808547.

The spelling of 1881540988 in words is "one billion, eight hundred eighty-one million, five hundred forty thousand, nine hundred eighty-eight".