3898889726381 has 16 divisors (see below), whose sum is σ = 4451776568064. Its totient is φ = 3382711659264.

The previous prime is 3898889726371. The next prime is 3898889726383. The reversal of 3898889726381 is 1836279888983.

It is a cyclic number.

It is not a de Polignac number, because 3898889726381 - 2¹⁸ = 3898889464237 is a prime.

It is a super-2 number, since 2×3898889726381² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3898889726296 and 3898889726305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3898889726383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11707961 + ... + 12036366.

It is an arithmetic number, because the mean of its divisors is an integer number (278236035504).

Almost surely, 2^{3898889726381} is an apocalyptic number.

It is an amenable number.

3898889726381 is a deficient number, since it is larger than the sum of its proper divisors (552886841683).

3898889726381 is a wasteful number, since it uses less digits than its factorization.

3898889726381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23745100.

The product of its digits is 2006581248, while the sum is 80.

The spelling of 3898889726381 in words is "three trillion, eight hundred ninety-eight billion, eight hundred eighty-nine million, seven hundred twenty-six thousand, three hundred eighty-one".