3994525920 has 768 divisors, whose sum is σ = 16944463872. Its totient is φ = 766402560.

The previous prime is 3994525919. The next prime is 3994525961. The reversal of 3994525920 is 295254993.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 3994525920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 31452897 + ... + 31453023.

It is an arithmetic number, because the mean of its divisors is an integer number (22063104).

Almost surely, 2^3994525920 is an apocalyptic number.

3994525920 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 3994525920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8472231936).

3994525920 is an abundant number, since it is smaller than the sum of its proper divisors (12949937952).

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

3994525920 is a wasteful number, since it uses less digits than its factorization.

3994525920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 48.

The square root of 3994525920 is about 63202.2619848372. The cubic root of 3994525920 is about 1586.6765913588.

The spelling of 3994525920 in words is "three billion, nine hundred ninety-four million, five hundred twenty-five thousand, nine hundred twenty".