228420623 has 4 divisors (see below), whose sum is σ = 228457728. Its totient is φ = 228383520.

The previous prime is 228420593. The next prime is 228420671. The reversal of 228420623 is 326024822.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228420623 - 2¹² = 228416527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228420323) 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, 6863 + ... + 22448.

It is an arithmetic number, because the mean of its divisors is an integer number (57114432).

Almost surely, 2^228420623 is an apocalyptic number.

228420623 is a deficient number, since it is larger than the sum of its proper divisors (37105).

228420623 is an equidigital number, since it uses as much as digits as its factorization.

228420623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37104.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 228420623 is about 15113.5906719747. The cubic root of 228420623 is about 611.2869211545.

The spelling of 228420623 in words is "two hundred twenty-eight million, four hundred twenty thousand, six hundred twenty-three".