228137438 has 16 divisors (see below), whose sum is σ = 351740880. Its totient is φ = 110932800.

The previous prime is 228137431. The next prime is 228137443. The reversal of 228137438 is 834731822.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228137431) 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, 353 + ... + 21363.

It is an arithmetic number, because the mean of its divisors is an integer number (21983805).

Almost surely, 2^228137438 is an apocalyptic number.

228137438 is a deficient number, since it is larger than the sum of its proper divisors (123603442).

228137438 is a wasteful number, since it uses less digits than its factorization.

228137438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21163.

The product of its digits is 64512, while the sum is 38.

The square root of 228137438 is about 15104.2192118626. The cubic root of 228137438 is about 611.0342018940.

The spelling of 228137438 in words is "two hundred twenty-eight million, one hundred thirty-seven thousand, four hundred thirty-eight".