228520992 has 48 divisors (see below), whose sum is σ = 685564992. Its totient is φ = 65291520.

The previous prime is 228520973. The next prime is 228520997. The reversal of 228520992 is 299025822.

228520992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 228520992.

It is not an unprimeable number, because it can be changed into a prime (228520997) 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, 169359 + ... + 170702.

It is an arithmetic number, because the mean of its divisors is an integer number (14282604).

Almost surely, 2^228520992 is an apocalyptic number.

It is an amenable number.

228520992 is an abundant number, since it is smaller than the sum of its proper divisors (457044000).

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

228520992 is a wasteful number, since it uses less digits than its factorization.

228520992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340081 (or 340073 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 228520992 is about 15116.9107955296. The cubic root of 228520992 is about 611.3764420742.

The spelling of 228520992 in words is "two hundred twenty-eight million, five hundred twenty thousand, nine hundred ninety-two".