1994985216 has 324 divisors, whose sum is σ = 6870243744. Its totient is φ = 554803200.

The previous prime is 1994985211. The next prime is 1994985217. The reversal of 1994985216 is 6125894991.

1994985216 is a `hidden beast` number, since 1 + 99 + 498 + 52 + 16 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994985211) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4628521 + ... + 4628951.

It is an arithmetic number, because the mean of its divisors is an integer number (21204456).

Almost surely, 2^1994985216 is an apocalyptic number.

1994985216 is a gapful number since it is divisible by the number (16) 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 1994985216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3435121872).

1994985216 is an abundant number, since it is smaller than the sum of its proper divisors (4875258528).

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

1994985216 is a wasteful number, since it uses less digits than its factorization.

1994985216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 484 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The square root of 1994985216 is about 44665.2573708022. The cubic root of 1994985216 is about 1258.8671298862.

The spelling of 1994985216 in words is "one billion, nine hundred ninety-four million, nine hundred eighty-five thousand, two hundred sixteen".