228138750 has 120 divisors (see below), whose sum is σ = 706161456. Its totient is φ = 52128000.

The previous prime is 228138749. The next prime is 228138763. The reversal of 228138750 is 57831822.

228138750 is a `hidden beast` number, since 228 + 1 + 387 + 50 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 77302 + ... + 80198.

Almost surely, 2^228138750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228138750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353080728).

228138750 is an abundant number, since it is smaller than the sum of its proper divisors (478022706).

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

228138750 is a wasteful number, since it uses less digits than its factorization.

228138750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932 (or 2914 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 228138750 is about 15104.2626433732. The cubic root of 228138750 is about 611.0353732279.

The spelling of 228138750 in words is "two hundred twenty-eight million, one hundred thirty-eight thousand, seven hundred fifty".