3988123257 has 8 divisors (see below), whose sum is σ = 5318067520. Its totient is φ = 2658463920.

The previous prime is 3988123241. The next prime is 3988123273. The reversal of 3988123257 is 7523218893.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3988123241) and next prime (3988123273).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3988123257 - 2⁴ = 3988123241 is a prime.

It is a super-2 number, since 2×3988123257² = 31810254226048576098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3988123207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36094 + ... + 96327.

It is an arithmetic number, because the mean of its divisors is an integer number (664758440).

Almost surely, 2^3988123257 is an apocalyptic number.

It is an amenable number.

3988123257 is a deficient number, since it is larger than the sum of its proper divisors (1329944263).

3988123257 is a wasteful number, since it uses less digits than its factorization.

3988123257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142463.

The product of its digits is 725760, while the sum is 48.

The square root of 3988123257 is about 63151.5895049365. The cubic root of 3988123257 is about 1585.8283982450.

The spelling of 3988123257 in words is "three billion, nine hundred eighty-eight million, one hundred twenty-three thousand, two hundred fifty-seven".