1881769920 has 56 divisors (see below), whose sum is σ = 5974622544. Its totient is φ = 501805056.

The previous prime is 1881769891. The next prime is 1881769921. The reversal of 1881769920 is 299671881.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881769921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 979129 + ... + 981048.

Almost surely, 2^1881769920 is an apocalyptic number.

1881769920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1881769920 is an abundant number, since it is smaller than the sum of its proper divisors (4092852624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1881769920 is a wasteful number, since it uses less digits than its factorization.

1881769920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960197 (or 1960187 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 51.

The square root of 1881769920 is about 43379.3720563127. The cubic root of 1881769920 is about 1234.5883486551.

The spelling of 1881769920 in words is "one billion, eight hundred eighty-one million, seven hundred sixty-nine thousand, nine hundred twenty".