13897912227840 has 384 divisors, whose sum is σ = 49438299456000. Its totient is φ = 3703442079744.

The previous prime is 13897912227833. The next prime is 13897912227919. The reversal of 13897912227840 is 4872221979831.

13897912227840 is a `hidden beast` number, since 1 + 389 + 79 + 122 + 27 + 8 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400049191 + ... + 400083929.

It is an arithmetic number, because the mean of its divisors is an integer number (128745571500).

Almost surely, 2^{13897912227840} is an apocalyptic number.

13897912227840 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 13897912227840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24719149728000).

13897912227840 is an abundant number, since it is smaller than the sum of its proper divisors (35540387228160).

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

13897912227840 is a wasteful number, since it uses less digits than its factorization.

13897912227840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36222 (or 36196 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 63.

The spelling of 13897912227840 in words is "thirteen trillion, eight hundred ninety-seven billion, nine hundred twelve million, two hundred twenty-seven thousand, eight hundred forty".