1981038150 has 216 divisors, whose sum is σ = 6668573184. Its totient is φ = 417916800.

The previous prime is 1981038149. The next prime is 1981038179. The reversal of 1981038150 is 518301891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 283195 + ... + 290105.

It is an arithmetic number, because the mean of its divisors is an integer number (30873024).

Almost surely, 2^1981038150 is an apocalyptic number.

1981038150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1981038150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3334286592).

1981038150 is an abundant number, since it is smaller than the sum of its proper divisors (4687535034).

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

1981038150 is a wasteful number, since it uses less digits than its factorization.

1981038150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6956 (or 6941 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

The square root of 1981038150 is about 44508.8547370071. The cubic root of 1981038150 is about 1255.9266606771.

The spelling of 1981038150 in words is "one billion, nine hundred eighty-one million, thirty-eight thousand, one hundred fifty".