1881965090 has 16 divisors (see below), whose sum is σ = 3466317888. Its totient is φ = 735279216.

The previous prime is 1881965083. The next prime is 1881965131. The reversal of 1881965090 is 905691881.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2187902 + ... + 2188761.

It is an arithmetic number, because the mean of its divisors is an integer number (216644868).

Almost surely, 2^1881965090 is an apocalyptic number.

1881965090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1881965090 is a deficient number, since it is larger than the sum of its proper divisors (1584352798).

1881965090 is a wasteful number, since it uses less digits than its factorization.

1881965090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4376713.

The product of its (nonzero) digits is 155520, while the sum is 47.

The square root of 1881965090 is about 43381.6215695080. The cubic root of 1881965090 is about 1234.6310294447.

The spelling of 1881965090 in words is "one billion, eight hundred eighty-one million, nine hundred sixty-five thousand, ninety".