226640656 has 20 divisors (see below), whose sum is σ = 479036304. Its totient is φ = 103018400.

The previous prime is 226640639. The next prime is 226640663. The reversal of 226640656 is 656046622.

It is a happy number.

It is a super-2 number, since 2×226640656² = 102731973904220672, which contains 22 as substring.

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, 643690 + ... + 644041.

Almost surely, 2^226640656 is an apocalyptic number.

It is an amenable number.

226640656 is an abundant number, since it is smaller than the sum of its proper divisors (252395648).

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

226640656 is a wasteful number, since it uses less digits than its factorization.

226640656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287750 (or 1287744 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 226640656 is about 15054.5892006391. The cubic root of 226640656 is about 609.6949617037.

The spelling of 226640656 in words is "two hundred twenty-six million, six hundred forty thousand, six hundred fifty-six".