981821292 has 48 divisors (see below), whose sum is σ = 2316625920. Its totient is φ = 323615488.

The previous prime is 981821273. The next prime is 981821297. The reversal of 981821292 is 292128189.

It is not an unprimeable number, because it can be changed into a prime (981821297) 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, 1137253 + ... + 1138115.

It is an arithmetic number, because the mean of its divisors is an integer number (48263040).

Almost surely, 2^981821292 is an apocalyptic number.

It is an amenable number.

981821292 is an abundant number, since it is smaller than the sum of its proper divisors (1334804628).

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

981821292 is a wasteful number, since it uses less digits than its factorization.

981821292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822 (or 1820 counting only the distinct ones).

The product of its digits is 41472, while the sum is 42.

The square root of 981821292 is about 31334.0277015260. The cubic root of 981821292 is about 993.9033369020.

The spelling of 981821292 in words is "nine hundred eighty-one million, eight hundred twenty-one thousand, two hundred ninety-two".