1994042456 has 48 divisors (see below), whose sum is σ = 4368605400. Its totient is φ = 850786944.

The previous prime is 1994042447. The next prime is 1994042467. The reversal of 1994042456 is 6542404991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77780 + ... + 100188.

Almost surely, 2^1994042456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1994042456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2184302700).

1994042456 is an abundant number, since it is smaller than the sum of its proper divisors (2374562944).

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

1994042456 is a wasteful number, since it uses less digits than its factorization.

1994042456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22656 (or 22645 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 1994042456 is about 44654.7025071268. The cubic root of 1994042456 is about 1258.6687998329.

The spelling of 1994042456 in words is "one billion, nine hundred ninety-four million, forty-two thousand, four hundred fifty-six".