3897992387520 has 2016 divisors, whose sum is σ = 18307530608640. Its totient is φ = 742315622400.

The previous prime is 3897992387519. The next prime is 3897992387567. The reversal of 3897992387520 is 257832997983.

3897992387520 is a `hidden beast` number, since 3 + 8 + 9 + 7 + 9 + 92 + 3 + 8 + 7 + 520 = 666.

3897992387520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (2016).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1436781684 + ... + 1436784396.

Almost surely, 2^{3897992387520} is an apocalyptic number.

3897992387520 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 3897992387520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9153765304320).

3897992387520 is an abundant number, since it is smaller than the sum of its proper divisors (14409538221120).

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

3897992387520 is a wasteful number, since it uses less digits than its factorization.

3897992387520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815 (or 2791 counting only the distinct ones).

The product of its (nonzero) digits is 411505920, while the sum is 72.

The spelling of 3897992387520 in words is "three trillion, eight hundred ninety-seven billion, nine hundred ninety-two million, three hundred eighty-seven thousand, five hundred twenty".