1994065920 has 576 divisors, whose sum is σ = 8647067520. Its totient is φ = 412876800.

The previous prime is 1994065877. The next prime is 1994065943. The reversal of 1994065920 is 295604991.

1994065920 is a `hidden beast` number, since 19 + 9 + 40 + 6 + 592 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7096180 + ... + 7096460.

It is an arithmetic number, because the mean of its divisors is an integer number (15012270).

Almost surely, 2^1994065920 is an apocalyptic number.

1994065920 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 1994065920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4323533760).

1994065920 is an abundant number, since it is smaller than the sum of its proper divisors (6653001600).

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

1994065920 is a wasteful number, since it uses less digits than its factorization.

1994065920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 1994065920 is about 44654.9652334430. The cubic root of 1994065920 is about 1258.6737367537.

The spelling of 1994065920 in words is "one billion, nine hundred ninety-four million, sixty-five thousand, nine hundred twenty".