3868218025 has 27 divisors (see below), whose sum is σ = 5582848869. Its totient is φ = 2650999680.

The previous prime is 3868218019. The next prime is 3868218059. The reversal of 3868218025 is 5208128683.

The square root of 3868218025 is 62195.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 70207641 + 3798010384 = 8379^2 + 61628^2 .

It is not a de Polignac number, because 3868218025 - 2⁷ = 3868217897 is a prime.

It is a super-2 number, since 2×3868218025² = 29926221377869801250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2175937 + ... + 2177713.

Almost surely, 2^3868218025 is an apocalyptic number.

3868218025 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3868218025 is the 62195-th square number.

3868218025 is the 31098-th centered octagonal number.

It is an amenable number.

3868218025 is a deficient number, since it is larger than the sum of its proper divisors (1714630844).

3868218025 is an frugal number, since it uses more digits than its factorization.

3868218025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3578 (or 1789 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The cubic root of 3868218025 is about 1569.7734571093.

The spelling of 3868218025 in words is "three billion, eight hundred sixty-eight million, two hundred eighteen thousand, twenty-five".