1994729472 has 144 divisors (see below), whose sum is σ = 5948691840. Its totient is φ = 643276800.

The previous prime is 1994729447. The next prime is 1994729483. The reversal of 1994729472 is 2749274991.

1994729472 is a `hidden beast` number, since 19 + 9 + 472 + 94 + 72 = 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 11 ways as a sum of consecutive naturals, for example, 569647 + ... + 573137.

It is an arithmetic number, because the mean of its divisors is an integer number (41310360).

Almost surely, 2^1994729472 is an apocalyptic number.

1994729472 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 1994729472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2974345920).

1994729472 is an abundant number, since it is smaller than the sum of its proper divisors (3953962368).

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

1994729472 is a wasteful number, since it uses less digits than its factorization.

1994729472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3550 (or 3527 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 1994729472 is about 44662.3943827467. The cubic root of 1994729472 is about 1258.8133347551.

The spelling of 1994729472 in words is "one billion, nine hundred ninety-four million, seven hundred twenty-nine thousand, four hundred seventy-two".