228138783 has 8 divisors (see below), whose sum is σ = 304308096. Its totient is φ = 152031000.

The previous prime is 228138767. The next prime is 228138811. The reversal of 228138783 is 387831822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 228138783 - 2⁴ = 228138767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228138763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5893 + ... + 22158.

It is an arithmetic number, because the mean of its divisors is an integer number (38038512).

Almost surely, 2^228138783 is an apocalyptic number.

228138783 is a deficient number, since it is larger than the sum of its proper divisors (76169313).

228138783 is a wasteful number, since it uses less digits than its factorization.

228138783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30765.

The product of its digits is 129024, while the sum is 42.

The square root of 228138783 is about 15104.2637357800. The cubic root of 228138783 is about 611.0354026897.

The spelling of 228138783 in words is "two hundred twenty-eight million, one hundred thirty-eight thousand, seven hundred eighty-three".