227656640 has 28 divisors (see below), whose sum is σ = 542108136. Its totient is φ = 91062528.

The previous prime is 227656603. The next prime is 227656661. The reversal of 227656640 is 46656722.

It is a junction number, because it is equal to n+sod(n) for n = 227656594 and 227656603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355394 + ... + 356033.

Almost surely, 2^227656640 is an apocalyptic number.

227656640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

227656640 is an abundant number, since it is smaller than the sum of its proper divisors (314451496).

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

227656640 is an equidigital number, since it uses as much as digits as its factorization.

227656640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711444 (or 711434 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 227656640 is about 15088.2948009376. The cubic root of 227656640 is about 610.6046499401.

The spelling of 227656640 in words is "two hundred twenty-seven million, six hundred fifty-six thousand, six hundred forty".