228392532 has 18 divisors (see below), whose sum is σ = 577325658. Its totient is φ = 76130832.

The previous prime is 228392473. The next prime is 228392537. The reversal of 228392532 is 235293822.

It can be written as a sum of positive squares in only one way, i.e., 172501956 + 55890576 = 13134^2 + 7476^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6344237 = 228392532 / (2 + 2 + 8 + 3 + 9 + 2 + 5 + 3 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228392537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3172083 + ... + 3172154.

Almost surely, 2^228392532 is an apocalyptic number.

It is an amenable number.

228392532 is an abundant number, since it is smaller than the sum of its proper divisors (348933126).

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

228392532 is a wasteful number, since it uses less digits than its factorization.

228392532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6344247 (or 6344242 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 228392532 is about 15112.6613142755. The cubic root of 228392532 is about 611.2618615887.

The spelling of 228392532 in words is "two hundred twenty-eight million, three hundred ninety-two thousand, five hundred thirty-two".