228309838 has 4 divisors (see below), whose sum is σ = 342464760. Its totient is φ = 114154918.

The previous prime is 228309821. The next prime is 228309839. The reversal of 228309838 is 838903822.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 228309794 and 228309803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228309839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57077458 + ... + 57077461.

It is an arithmetic number, because the mean of its divisors is an integer number (85616190).

Almost surely, 2^228309838 is an apocalyptic number.

228309838 is a deficient number, since it is larger than the sum of its proper divisors (114154922).

228309838 is a wasteful number, since it uses less digits than its factorization.

228309838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114154921.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 228309838 is about 15109.9251487226. The cubic root of 228309838 is about 611.1880795642.

The spelling of 228309838 in words is "two hundred twenty-eight million, three hundred nine thousand, eight hundred thirty-eight".