3898129225 has 9 divisors (see below), whose sum is σ = 4834067367. Its totient is φ = 3118253640.

The previous prime is 3898129201. The next prime is 3898129229. The reversal of 3898129225 is 5229218983.

The square root of 3898129225 is 62435.

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

3898129225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1403326521 + 2494802704 = 37461^2 + 49948^2 .

It is not a de Polignac number, because 3898129225 - 2⁷ = 3898129097 is a prime.

It is a super-2 number, since 2×3898129225² = 30390822909598201250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3898129229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 305932 + ... + 318418.

Almost surely, 2^3898129225 is an apocalyptic number.

3898129225 is the 62435-th square number.

3898129225 is the 31218-th centered octagonal number.

It is an amenable number.

3898129225 is a deficient number, since it is larger than the sum of its proper divisors (935938142).

3898129225 is an frugal number, since it uses more digits than its factorization.

3898129225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24984 (or 12492 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The cubic root of 3898129225 is about 1573.8091914363.

Multiplying 3898129225 by its sum of digits (49), we get a square (191008332025 = 437045²).

The spelling of 3898129225 in words is "three billion, eight hundred ninety-eight million, one hundred twenty-nine thousand, two hundred twenty-five".