228900138 has 48 divisors (see below), whose sum is σ = 491504544. Its totient is φ = 71046400.

The previous prime is 228900131. The next prime is 228900143. The reversal of 228900138 is 831009822.

It is a junction number, because it is equal to n+sod(n) for n = 228900099 and 228900108.

It is not an unprimeable number, because it can be changed into a prime (228900131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174481 + ... + 175787.

It is an arithmetic number, because the mean of its divisors is an integer number (10239678).

Almost surely, 2^228900138 is an apocalyptic number.

228900138 is an abundant number, since it is smaller than the sum of its proper divisors (262604406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228900138 is a wasteful number, since it uses less digits than its factorization.

228900138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447 (or 1430 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 228900138 is about 15129.4460572752. The cubic root of 228900138 is about 611.7143728883.

The spelling of 228900138 in words is "two hundred twenty-eight million, nine hundred thousand, one hundred thirty-eight".