226381428 has 144 divisors (see below), whose sum is σ = 741569920. Its totient is φ = 56547072.

The previous prime is 226381423. The next prime is 226381471. The reversal of 226381428 is 824183622.

226381428 is a `hidden beast` number, since 2 + 2 + 638 + 14 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 226381392 and 226381401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226381423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60426 + ... + 64062.

Almost surely, 2^226381428 is an apocalyptic number.

226381428 is a gapful number since it is divisible by the number (28) 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 226381428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370784960).

226381428 is an abundant number, since it is smaller than the sum of its proper divisors (515188492).

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

226381428 is a wasteful number, since it uses less digits than its factorization.

226381428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3686 (or 3681 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 226381428 is about 15045.9771367632. The cubic root of 226381428 is about 609.4624198686.

The spelling of 226381428 in words is "two hundred twenty-six million, three hundred eighty-one thousand, four hundred twenty-eight".