226666840 has 64 divisors (see below), whose sum is σ = 534340800. Its totient is φ = 86372352.

The previous prime is 226666807. The next prime is 226666841. The reversal of 226666840 is 48666622.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 226666793 and 226666802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226666841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398076 + ... + 398644.

It is an arithmetic number, because the mean of its divisors is an integer number (8349075).

Almost surely, 2^226666840 is an apocalyptic number.

226666840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 226666840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267170400).

226666840 is an abundant number, since it is smaller than the sum of its proper divisors (307673960).

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

226666840 is a wasteful number, since it uses less digits than its factorization.

226666840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036 (or 1032 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 226666840 is about 15055.4588106773. The cubic root of 226666840 is about 609.7184403364.

The spelling of 226666840 in words is "two hundred twenty-six million, six hundred sixty-six thousand, eight hundred forty".