1981072110 has 32 divisors (see below), whose sum is σ = 4961295360. Its totient is φ = 505316768.

The previous prime is 1981072109. The next prime is 1981072117. The reversal of 1981072110 is 112701891.

1981072110 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981072117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1434870 + ... + 1436249.

It is an arithmetic number, because the mean of its divisors is an integer number (155040480).

Almost surely, 2^1981072110 is an apocalyptic number.

1981072110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1981072110 is an abundant number, since it is smaller than the sum of its proper divisors (2980223250).

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

1981072110 is a wasteful number, since it uses less digits than its factorization.

1981072110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871152.

The product of its (nonzero) digits is 1008, while the sum is 30.

The square root of 1981072110 is about 44509.2362324945. The cubic root of 1981072110 is about 1255.9338372216.

The spelling of 1981072110 in words is "one billion, nine hundred eighty-one million, seventy-two thousand, one hundred ten".