1981708254 has 96 divisors (see below), whose sum is σ = 4547751936. Its totient is φ = 646652160.

The previous prime is 1981708247. The next prime is 1981708273. The reversal of 1981708254 is 4528071891.

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, 5986869 + ... + 5987199.

It is an arithmetic number, because the mean of its divisors is an integer number (47372416).

Almost surely, 2^1981708254 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1981708254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2273875968).

1981708254 is an abundant number, since it is smaller than the sum of its proper divisors (2566043682).

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

1981708254 is a wasteful number, since it uses less digits than its factorization.

1981708254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1981708254 is about 44516.3818610632. The cubic root of 1981708254 is about 1256.0682542154.

The spelling of 1981708254 in words is "one billion, nine hundred eighty-one million, seven hundred eight thousand, two hundred fifty-four".