1994297760 has 960 divisors, whose sum is σ = 9220780800. Its totient is φ = 394149888.

The previous prime is 1994297729. The next prime is 1994297791. The reversal of 1994297760 is 677924991.

1994297760 is a `hidden beast` number, since 1 + 99 + 429 + 77 + 60 = 666.

It is an interprime number because it is at equal distance from previous prime (1994297729) and next prime (1994297791).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1994297697 and 1994297706.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 22407796 + ... + 22407884.

It is an arithmetic number, because the mean of its divisors is an integer number (9604980).

Almost surely, 2^1994297760 is an apocalyptic number.

1994297760 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 1994297760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4610390400).

1994297760 is an abundant number, since it is smaller than the sum of its proper divisors (7226483040).

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

1994297760 is a wasteful number, since it uses less digits than its factorization.

1994297760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The square root of 1994297760 is about 44657.5610619299. The cubic root of 1994297760 is about 1258.7225147484.

The spelling of 1994297760 in words is "one billion, nine hundred ninety-four million, two hundred ninety-seven thousand, seven hundred sixty".