228873645 has 96 divisors (see below), whose sum is σ = 532756224. Its totient is φ = 87782400.

The previous prime is 228873643. The next prime is 228873653. The reversal of 228873645 is 546378822.

228873645 is a `hidden beast` number, since 2 + 288 + 7 + 364 + 5 = 666.

It is not a de Polignac number, because 228873645 - 2¹ = 228873643 is a prime.

It is a super-3 number, since 3×228873645³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

Its product of digits (645120) is a multiple of the sum of its prime divisors (5120).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 228873645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228873643) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 42505 + ... + 47585.

It is an arithmetic number, because the mean of its divisors is an integer number (5549544).

Almost surely, 2^228873645 is an apocalyptic number.

It is an amenable number.

228873645 is an abundant number, since it is smaller than the sum of its proper divisors (303882579).

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

228873645 is a wasteful number, since it uses less digits than its factorization.

228873645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5123 (or 5120 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 228873645 is about 15128.5704876568. The cubic root of 228873645 is about 611.6907719499.

The spelling of 228873645 in words is "two hundred twenty-eight million, eight hundred seventy-three thousand, six hundred forty-five".