1985122944 has 256 divisors, whose sum is σ = 6914457600. Its totient is φ = 548674560.

The previous prime is 1985122901. The next prime is 1985122949. The reversal of 1985122944 is 4492215891.

It is a happy number.

1985122944 is a `hidden beast` number, since 1 + 98 + 512 + 2 + 9 + 44 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1985122944.

It is not an unprimeable number, because it can be changed into a prime (1985122949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 748629 + ... + 751275.

It is an arithmetic number, because the mean of its divisors is an integer number (27009600).

Almost surely, 2^1985122944 is an apocalyptic number.

1985122944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1985122944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3457228800).

1985122944 is an abundant number, since it is smaller than the sum of its proper divisors (4929334656).

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

1985122944 is a wasteful number, since it uses less digits than its factorization.

1985122944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2708 (or 2690 counting only the distinct ones).

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

The square root of 1985122944 is about 44554.7185379955. The cubic root of 1985122944 is about 1256.7892857701.

The spelling of 1985122944 in words is "one billion, nine hundred eighty-five million, one hundred twenty-two thousand, nine hundred forty-four".