3889872557 has 4 divisors (see below), whose sum is σ = 3900892380. Its totient is φ = 3878852736.

The previous prime is 3889872521. The next prime is 3889872589. The reversal of 3889872557 is 7552789883.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1834066276 + 2055806281 = 42826^2 + 45341^2 .

It is a cyclic number.

It is not a de Polignac number, because 3889872557 - 2¹⁶ = 3889807021 is a prime.

It is a super-2 number, since 2×3889872557² = 30262217019403436498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3889872557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3889877557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5509382 + ... + 5510087.

It is an arithmetic number, because the mean of its divisors is an integer number (975223095).

Almost surely, 2^3889872557 is an apocalyptic number.

It is an amenable number.

3889872557 is a deficient number, since it is larger than the sum of its proper divisors (11019823).

3889872557 is a wasteful number, since it uses less digits than its factorization.

3889872557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11019822.

The product of its digits is 33868800, while the sum is 62.

The square root of 3889872557 is about 62368.8428383917. The cubic root of 3889872557 is about 1572.6972387886.

The spelling of 3889872557 in words is "three billion, eight hundred eighty-nine million, eight hundred seventy-two thousand, five hundred fifty-seven".