981651384 has 192 divisors, whose sum is σ = 3113510400. Its totient is φ = 273652992.

The previous prime is 981651373. The next prime is 981651413. The reversal of 981651384 is 483156189.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5878069 + ... + 5878235.

It is an arithmetic number, because the mean of its divisors is an integer number (16216200).

Almost surely, 2^981651384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981651384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1556755200).

981651384 is an abundant number, since it is smaller than the sum of its proper divisors (2131859016).

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

981651384 is a wasteful number, since it uses less digits than its factorization.

981651384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 395 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 981651384 is about 31331.3163464289. The cubic root of 981651384 is about 993.8460006461.

The spelling of 981651384 in words is "nine hundred eighty-one million, six hundred fifty-one thousand, three hundred eighty-four".