981985092 has 96 divisors (see below), whose sum is σ = 2624154624. Its totient is φ = 282902400.

The previous prime is 981985061. The next prime is 981985097. The reversal of 981985092 is 290589189.

It is not an unprimeable number, because it can be changed into a prime (981985097) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 548623 + ... + 550409.

It is an arithmetic number, because the mean of its divisors is an integer number (27334944).

Almost surely, 2^981985092 is an apocalyptic number.

981985092 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981985092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1312077312).

981985092 is an abundant number, since it is smaller than the sum of its proper divisors (1642169532).

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

981985092 is a wasteful number, since it uses less digits than its factorization.

981985092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009 (or 2007 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 51.

The square root of 981985092 is about 31336.6413643836. The cubic root of 981985092 is about 993.9586057223.

The spelling of 981985092 in words is "nine hundred eighty-one million, nine hundred eighty-five thousand, ninety-two".