1881487090 has 32 divisors (see below), whose sum is σ = 3873608064. Its totient is φ = 644561280.

The previous prime is 1881487067. The next prime is 1881487159. The reversal of 1881487090 is 907841881.

It is a self number, because there is not a number n which added to its sum of digits gives 1881487090.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82297 + ... + 102643.

It is an arithmetic number, because the mean of its divisors is an integer number (121050252).

Almost surely, 2^1881487090 is an apocalyptic number.

1881487090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1881487090 is an abundant number, since it is smaller than the sum of its proper divisors (1992120974).

1881487090 is a wasteful number, since it uses less digits than its factorization.

1881487090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21682.

The product of its (nonzero) digits is 129024, while the sum is 46.

The square root of 1881487090 is about 43376.1119742192. Note that the first 3 decimals coincide. The cubic root of 1881487090 is about 1234.5264926838.

The spelling of 1881487090 in words is "one billion, eight hundred eighty-one million, four hundred eighty-seven thousand, ninety".