239228028 has 36 divisors (see below), whose sum is σ = 651233128. Its totient is φ = 73608480.

The previous prime is 239228027. The next prime is 239228111. The reversal of 239228028 is 820822932.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 239227983 and 239228001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239228027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255118 + ... + 256053.

Almost surely, 2^239228028 is an apocalyptic number.

It is an amenable number.

239228028 is an abundant number, since it is smaller than the sum of its proper divisors (412005100).

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

239228028 is a wasteful number, since it uses less digits than its factorization.

239228028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511194 (or 511189 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 239228028 is about 15466.9980280596. The cubic root of 239228028 is about 620.7794809296.

The spelling of 239228028 in words is "two hundred thirty-nine million, two hundred twenty-eight thousand, twenty-eight".