1981962150 has 96 divisors (see below), whose sum is σ = 5629782528. Its totient is φ = 452025600.

The previous prime is 1981962139. The next prime is 1981962173. The reversal of 1981962150 is 512691891.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

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, 545239 + ... + 548861.

It is an arithmetic number, because the mean of its divisors is an integer number (58643568).

Almost surely, 2^1981962150 is an apocalyptic number.

1981962150 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 1981962150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2814891264).

1981962150 is an abundant number, since it is smaller than the sum of its proper divisors (3647820378).

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

1981962150 is a wasteful number, since it uses less digits than its factorization.

1981962150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166 (or 4161 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 42.

The square root of 1981962150 is about 44519.2334839674. The cubic root of 1981962150 is about 1256.1218943154.

The spelling of 1981962150 in words is "one billion, nine hundred eighty-one million, nine hundred sixty-two thousand, one hundred fifty".