3928638229 has 2 divisors, whose sum is σ = 3928638230. Its totient is φ = 3928638228.

The previous prime is 3928638191. The next prime is 3928638247. The reversal of 3928638229 is 9228368293.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3599760004 + 328878225 = 59998^2 + 18135^2 .

It is a cyclic number.

It is not a de Polignac number, because 3928638229 - 2¹¹ = 3928636181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3928638269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1964319114 + 1964319115.

It is an arithmetic number, because the mean of its divisors is an integer number (1964319115).

Almost surely, 2^3928638229 is an apocalyptic number.

It is an amenable number.

3928638229 is a deficient number, since it is larger than the sum of its proper divisors (1).

3928638229 is an equidigital number, since it uses as much as digits as its factorization.

3928638229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 52.

The square root of 3928638229 is about 62678.8499336100. The cubic root of 3928638229 is about 1577.9043718618.

The spelling of 3928638229 in words is "three billion, nine hundred twenty-eight million, six hundred thirty-eight thousand, two hundred twenty-nine".