228539977 has 4 divisors (see below), whose sum is σ = 232286596. Its totient is φ = 224793360.

The previous prime is 228539957. The next prime is 228540007. The reversal of 228539977 is 779935822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 779935822 = 2 ⋅389967911.

It can be written as a sum of positive squares in 2 ways, for example, as 68492176 + 160047801 = 8276^2 + 12651^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228539977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228539947) 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 3 ways as a sum of consecutive naturals, for example, 1873218 + ... + 1873339.

It is an arithmetic number, because the mean of its divisors is an integer number (58071649).

Almost surely, 2^228539977 is an apocalyptic number.

It is an amenable number.

228539977 is a deficient number, since it is larger than the sum of its proper divisors (3746619).

228539977 is an equidigital number, since it uses as much as digits as its factorization.

228539977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3746618.

The product of its digits is 1905120, while the sum is 52.

The square root of 228539977 is about 15117.5387216306. The cubic root of 228539977 is about 611.3933721896.

The spelling of 228539977 in words is "two hundred twenty-eight million, five hundred thirty-nine thousand, nine hundred seventy-seven".