1994782068 has 18 divisors (see below), whose sum is σ = 5042365874. Its totient is φ = 664927344.

The previous prime is 1994782067. The next prime is 1994782093. The reversal of 1994782068 is 8602874991.

1994782068 is a `hidden beast` number, since 1 + 99 + 478 + 20 + 68 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1787767524 + 207014544 = 42282^2 + 14388^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994782067) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27705271 + ... + 27705342.

Almost surely, 2^1994782068 is an apocalyptic number.

1994782068 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1994782068 is an abundant number, since it is smaller than the sum of its proper divisors (3047583806).

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

1994782068 is a wasteful number, since it uses less digits than its factorization.

1994782068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55410623 (or 55410618 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The square root of 1994782068 is about 44662.9831963786. The cubic root of 1994782068 is about 1258.8243985719.

The spelling of 1994782068 in words is "one billion, nine hundred ninety-four million, seven hundred eighty-two thousand, sixty-eight".