1981419072 has 28 divisors (see below), whose sum is σ = 5242505136. Its totient is φ = 660472960.

The previous prime is 1981419067. The next prime is 1981419101. The reversal of 1981419072 is 2709141891.

It is a super-3 number, since 3×1981419072³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5159754 + ... + 5160137.

Almost surely, 2^1981419072 is an apocalyptic number.

1981419072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1981419072 is an abundant number, since it is smaller than the sum of its proper divisors (3261086064).

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

1981419072 is a wasteful number, since it uses less digits than its factorization.

1981419072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10319906 (or 10319896 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 1981419072 is about 44513.1337023131. The cubic root of 1981419072 is about 1256.0071537316.

The spelling of 1981419072 in words is "one billion, nine hundred eighty-one million, four hundred nineteen thousand, seventy-two".