228742377 has 4 divisors (see below), whose sum is σ = 304989840. Its totient is φ = 152494916.

The previous prime is 228742363. The next prime is 228742417. The reversal of 228742377 is 773247822.

228742377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 228742377 - 2¹⁰ = 228741353 is a prime.

It is a super-2 number, since 2×228742377² = 104646150071220258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228742307) 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, 38123727 + ... + 38123732.

It is an arithmetic number, because the mean of its divisors is an integer number (76247460).

Almost surely, 2^228742377 is an apocalyptic number.

It is an amenable number.

228742377 is a deficient number, since it is larger than the sum of its proper divisors (76247463).

228742377 is an equidigital number, since it uses as much as digits as its factorization.

228742377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76247462.

The product of its digits is 263424, while the sum is 42.

The square root of 228742377 is about 15124.2314515482. The cubic root of 228742377 is about 611.5738067135.

Subtracting 228742377 from its reverse (773247822), we obtain a palindrome (544505445).

The spelling of 228742377 in words is "two hundred twenty-eight million, seven hundred forty-two thousand, three hundred seventy-seven".