228787469 has 4 divisors (see below), whose sum is σ = 229425120. Its totient is φ = 228149820.

The previous prime is 228787457. The next prime is 228787487. The reversal of 228787469 is 964787822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 964787822 = 2 ⋅482393911.

It is a cyclic number.

It is not a de Polignac number, because 228787469 - 2⁸ = 228787213 is a prime.

It is a super-2 number, since 2×228787469² = 104687411942851922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228787469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228787369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318287 + ... + 319004.

It is an arithmetic number, because the mean of its divisors is an integer number (57356280).

Almost surely, 2^228787469 is an apocalyptic number.

It is an amenable number.

228787469 is a deficient number, since it is larger than the sum of its proper divisors (637651).

228787469 is an equidigital number, since it uses as much as digits as its factorization.

228787469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637650.

The product of its digits is 2709504, while the sum is 53.

The square root of 228787469 is about 15125.7220984652. The cubic root of 228787469 is about 611.6139906015.

The spelling of 228787469 in words is "two hundred twenty-eight million, seven hundred eighty-seven thousand, four hundred sixty-nine".