228538413 has 6 divisors (see below), whose sum is σ = 330111054. Its totient is φ = 152358936.

The previous prime is 228538397. The next prime is 228538423. The reversal of 228538413 is 314835822.

It can be written as a sum of positive squares in only one way, i.e., 175350564 + 53187849 = 13242^2 + 7293^2 .

It is not a de Polignac number, because 228538413 - 2⁴ = 228538397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228538423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12696570 + ... + 12696587.

It is an arithmetic number, because the mean of its divisors is an integer number (55018509).

Almost surely, 2^228538413 is an apocalyptic number.

It is an amenable number.

228538413 is a deficient number, since it is larger than the sum of its proper divisors (101572641).

228538413 is a wasteful number, since it uses less digits than its factorization.

228538413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25393163 (or 25393160 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 228538413 is about 15117.4869935449. The cubic root of 228538413 is about 611.3919775082.

The spelling of 228538413 in words is "two hundred twenty-eight million, five hundred thirty-eight thousand, four hundred thirteen".