3898118257 has 4 divisors (see below), whose sum is σ = 4252492656. Its totient is φ = 3543743860.

The previous prime is 3898118249. The next prime is 3898118291. The reversal of 3898118257 is 7528118983.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3898118257 - 2³ = 3898118249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3898118227) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 177187183 + ... + 177187204.

It is an arithmetic number, because the mean of its divisors is an integer number (1063123164).

Almost surely, 2^3898118257 is an apocalyptic number.

It is an amenable number.

3898118257 is a deficient number, since it is larger than the sum of its proper divisors (354374399).

3898118257 is a wasteful number, since it uses less digits than its factorization.

3898118257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354374398.

The product of its digits is 967680, while the sum is 52.

The square root of 3898118257 is about 62434.9121645895. The cubic root of 3898118257 is about 1573.8077153817.

It can be divided in two parts, 38981 and 18257, that multiplied together give a palindrome (711676117).

The spelling of 3898118257 in words is "three billion, eight hundred ninety-eight million, one hundred eighteen thousand, two hundred fifty-seven".