3997512000 has 560 divisors, whose sum is σ = 15342412800. Its totient is φ = 1026432000.

The previous prime is 3997511929. The next prime is 3997512037. The reversal of 3997512000 is 2157993.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 79 ways as a sum of consecutive naturals, for example, 20087901 + ... + 20088099.

Almost surely, 2^3997512000 is an apocalyptic number.

3997512000 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 3997512000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7671206400).

3997512000 is an abundant number, since it is smaller than the sum of its proper divisors (11344900800).

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

3997512000 is a wasteful number, since it uses less digits than its factorization.

3997512000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 3997512000 is about 63225.8807767832. The cubic root of 3997512000 is about 1587.0718625554.

Adding to 3997512000 its reverse (2157993), we get a palindrome (3999669993).

The spelling of 3997512000 in words is "three billion, nine hundred ninety-seven million, five hundred twelve thousand".