228722740 has 12 divisors (see below), whose sum is σ = 480317796. Its totient is φ = 91489088.

The previous prime is 228722731. The next prime is 228722749. The reversal of 228722740 is 47227822.

It is an interprime number because it is at equal distance from previous prime (228722731) and next prime (228722749).

It can be written as a sum of positive squares in 2 ways, for example, as 175403536 + 53319204 = 13244^2 + 7302^2 .

It is a junction number, because it is equal to n+sod(n) for n = 228722696 and 228722705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228722749) 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, 5718049 + ... + 5718088.

It is an arithmetic number, because the mean of its divisors is an integer number (40026483).

Almost surely, 2^228722740 is an apocalyptic number.

228722740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228722740 is an abundant number, since it is smaller than the sum of its proper divisors (251595056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228722740 is a wasteful number, since it uses less digits than its factorization.

228722740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11436146 (or 11436144 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 228722740 is about 15123.5822476026. The cubic root of 228722740 is about 611.5563054839.

The spelling of 228722740 in words is "two hundred twenty-eight million, seven hundred twenty-two thousand, seven hundred forty".