3994859520 has 192 divisors, whose sum is σ = 14201460000. Its totient is φ = 1065222144.

The previous prime is 3994859513. The next prime is 3994859537. The reversal of 3994859520 is 259584993.

It is a happy number.

3994859520 is a `hidden beast` number, since 3 + 9 + 9 + 48 + 595 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269256 + ... + 283704.

Almost surely, 2^3994859520 is an apocalyptic number.

3994859520 is a gapful number since it is divisible by the number (30) 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 3994859520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7100730000).

3994859520 is an abundant number, since it is smaller than the sum of its proper divisors (10206600480).

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

3994859520 is a wasteful number, since it uses less digits than its factorization.

3994859520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14485 (or 14459 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The square root of 3994859520 is about 63204.9010757868. The cubic root of 3994859520 is about 1586.7207601861.

The spelling of 3994859520 in words is "three billion, nine hundred ninety-four million, eight hundred fifty-nine thousand, five hundred twenty".