228620939 has 18 divisors (see below), whose sum is σ = 249699780. Its totient is φ = 209283480.

The previous prime is 228620911. The next prime is 228620957. The reversal of 228620939 is 939026822.

228620939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 228620939 - 2¹⁶ = 228555403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228620896 and 228620905.

It is not an unprimeable number, because it can be changed into a prime (228620999) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 346592 + ... + 347250.

It is an arithmetic number, because the mean of its divisors is an integer number (13872210).

Almost surely, 2^228620939 is an apocalyptic number.

228620939 is a deficient number, since it is larger than the sum of its proper divisors (21078841).

228620939 is an equidigital number, since it uses as much as digits as its factorization.

228620939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 228620939 is about 15120.2162352263. The cubic root of 228620939 is about 611.4655605609.

The spelling of 228620939 in words is "two hundred twenty-eight million, six hundred twenty thousand, nine hundred thirty-nine".