1994549472 has 144 divisors (see below), whose sum is σ = 6176898000. Its totient is φ = 608090112.

The previous prime is 1994549461. The next prime is 1994549507. The reversal of 1994549472 is 2749454991.

1994549472 is a `hidden beast` number, since 1 + 9 + 94 + 549 + 4 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152404 + ... + 164972.

It is an arithmetic number, because the mean of its divisors is an integer number (42895125).

Almost surely, 2^1994549472 is an apocalyptic number.

1994549472 is a gapful number since it is divisible by the number (12) 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 1994549472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3088449000).

1994549472 is an abundant number, since it is smaller than the sum of its proper divisors (4182348528).

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

1994549472 is a wasteful number, since it uses less digits than its factorization.

1994549472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12633 (or 12622 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 1994549472 is about 44660.3792191692. The cubic root of 1994549472 is about 1258.7754694340.

The spelling of 1994549472 in words is "one billion, nine hundred ninety-four million, five hundred forty-nine thousand, four hundred seventy-two".