228640832 has 56 divisors (see below), whose sum is σ = 545835840. Its totient is φ = 92828160.

The previous prime is 228640831. The next prime is 228640849. The reversal of 228640832 is 238046822.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 228640792 and 228640801.

It is not an unprimeable number, because it can be changed into a prime (228640831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4919 + ... + 21942.

Almost surely, 2^228640832 is an apocalyptic number.

It is an amenable number.

228640832 is an abundant number, since it is smaller than the sum of its proper divisors (317195008).

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

228640832 is a wasteful number, since it uses less digits than its factorization.

228640832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26899 (or 26889 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 228640832 is about 15120.8740488108. The cubic root of 228640832 is about 611.4832952031.

The spelling of 228640832 in words is "two hundred twenty-eight million, six hundred forty thousand, eight hundred thirty-two".