228722739 has 24 divisors (see below), whose sum is σ = 366993360. Its totient is φ = 126189504.

The previous prime is 228722731. The next prime is 228722749. The reversal of 228722739 is 937227822.

It is not a de Polignac number, because 228722739 - 2³ = 228722731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228722739.

It is not an unprimeable number, because it can be changed into a prime (228722731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22564 + ... + 31089.

It is an arithmetic number, because the mean of its divisors is an integer number (15291390).

Almost surely, 2^228722739 is an apocalyptic number.

228722739 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

228722739 is a deficient number, since it is larger than the sum of its proper divisors (138270621).

228722739 is a wasteful number, since it uses less digits than its factorization.

228722739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53699 (or 53692 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 228722739 is about 15123.5822145416. The cubic root of 228722739 is about 611.5563045927.

The spelling of 228722739 in words is "two hundred twenty-eight million, seven hundred twenty-two thousand, seven hundred thirty-nine".