228745740 has 48 divisors (see below), whose sum is σ = 641152512. Its totient is φ = 60935616.

The previous prime is 228745739. The next prime is 228745747. The reversal of 228745740 is 47547822.

It is a super-2 number, since 2×228745740² = 104649227136295200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228745747) 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 15 ways as a sum of consecutive naturals, for example, 98877 + ... + 101163.

It is an arithmetic number, because the mean of its divisors is an integer number (13357344).

Almost surely, 2^228745740 is an apocalyptic number.

228745740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228745740 is an abundant number, since it is smaller than the sum of its proper divisors (412406772).

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

228745740 is a wasteful number, since it uses less digits than its factorization.

228745740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3966 (or 3964 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 39.

The square root of 228745740 is about 15124.3426303426. The cubic root of 228745740 is about 611.5768038445.

The spelling of 228745740 in words is "two hundred twenty-eight million, seven hundred forty-five thousand, seven hundred forty".