1994257760 has 96 divisors (see below), whose sum is σ = 5442165792. Its totient is φ = 682516480.

The previous prime is 1994257723. The next prime is 1994257763. The reversal of 1994257760 is 677524991.

It is a junction number, because it is equal to n+sod(n) for n = 1994257699 and 1994257708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994257763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3407 + ... + 63246.

It is an arithmetic number, because the mean of its divisors is an integer number (56689227).

Almost surely, 2^1994257760 is an apocalyptic number.

1994257760 is a gapful number since it is divisible by the number (10) 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 1994257760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2721082896).

1994257760 is an abundant number, since it is smaller than the sum of its proper divisors (3447908032).

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

1994257760 is a wasteful number, since it uses less digits than its factorization.

1994257760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66696 (or 66688 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 50.

The square root of 1994257760 is about 44657.1132071924. The cubic root of 1994257760 is about 1258.7140992152.

The spelling of 1994257760 in words is "one billion, nine hundred ninety-four million, two hundred fifty-seven thousand, seven hundred sixty".