1994787256 has 96 divisors (see below), whose sum is σ = 4899847680. Its totient is φ = 752068800.

The previous prime is 1994787233. The next prime is 1994787283. The reversal of 1994787256 is 6527874991.

It is a self number, because there is not a number n which added to its sum of digits gives 1994787256.

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, 126211 + ... + 141133.

It is an arithmetic number, because the mean of its divisors is an integer number (51040080).

Almost surely, 2^1994787256 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 1994787256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2449923840).

1994787256 is an abundant number, since it is smaller than the sum of its proper divisors (2905060424).

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

1994787256 is a wasteful number, since it uses less digits than its factorization.

1994787256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14985 (or 14974 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 58.

The square root of 1994787256 is about 44663.0412757573. The cubic root of 1994787256 is about 1258.8254898817.

The spelling of 1994787256 in words is "one billion, nine hundred ninety-four million, seven hundred eighty-seven thousand, two hundred fifty-six".