228863657 has 4 divisors (see below), whose sum is σ = 249669456. Its totient is φ = 208057860.

The previous prime is 228863653. The next prime is 228863717. The reversal of 228863657 is 756368822.

It is a happy number.

228863657 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 228863657 - 2² = 228863653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228863651) 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, 10402883 + ... + 10402904.

It is an arithmetic number, because the mean of its divisors is an integer number (62417364).

Almost surely, 2^228863657 is an apocalyptic number.

It is an amenable number.

228863657 is a deficient number, since it is larger than the sum of its proper divisors (20805799).

228863657 is a wasteful number, since it uses less digits than its factorization.

228863657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20805798.

The product of its digits is 967680, while the sum is 47.

The square root of 228863657 is about 15128.2403801632. The cubic root of 228863657 is about 611.6818737996.

The spelling of 228863657 in words is "two hundred twenty-eight million, eight hundred sixty-three thousand, six hundred fifty-seven".