228376638 has 32 divisors (see below), whose sum is σ = 580005120. Its totient is φ = 65250360.

The previous prime is 228376571. The next prime is 228376651. The reversal of 228376638 is 836673822.

228376638 is a `hidden beast` number, since 2 + 2 + 8 + 3 + 7 + 6 + 638 = 666.

228376638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 228376593 and 228376602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301708 + ... + 302463.

It is an arithmetic number, because the mean of its divisors is an integer number (18125160).

Almost surely, 2^228376638 is an apocalyptic number.

228376638 is an abundant number, since it is smaller than the sum of its proper divisors (351628482).

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

228376638 is a wasteful number, since it uses less digits than its factorization.

228376638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604189 (or 604183 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 228376638 is about 15112.1354546603. The cubic root of 228376638 is about 611.2476818761.

The spelling of 228376638 in words is "two hundred twenty-eight million, three hundred seventy-six thousand, six hundred thirty-eight".