228263861 has 16 divisors (see below), whose sum is σ = 268531200. Its totient is φ = 189992688.

The previous prime is 228263857. The next prime is 228263863. The reversal of 228263861 is 168362822.

228263861 = 56² + 57² + ... + 881².

It is a cyclic number.

It is not a de Polignac number, because 228263861 - 2² = 228263857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228263863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30950 + ... + 37608.

It is an arithmetic number, because the mean of its divisors is an integer number (16783200).

Almost surely, 2^228263861 is an apocalyptic number.

It is an amenable number.

228263861 is a deficient number, since it is larger than the sum of its proper divisors (40267339).

228263861 is an equidigital number, since it uses as much as digits as its factorization.

228263861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6808.

The product of its digits is 55296, while the sum is 38.

The square root of 228263861 is about 15108.4036549200. The cubic root of 228263861 is about 611.1470498228.

The spelling of 228263861 in words is "two hundred twenty-eight million, two hundred sixty-three thousand, eight hundred sixty-one".