2236428 has 72 divisors (see below), whose sum is σ = 6141408. Its totient is φ = 684288.

The previous prime is 2236417. The next prime is 2236457. The reversal of 2236428 is 8246322.

2236428 is a `hidden beast` number, since 2 + 236 + 428 = 666.

It is a super-2 number, since 2×2236428² = 10003220398368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30600 + ... + 30672.

2^2236428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2236428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3070704).

2236428 is an abundant number, since it is smaller than the sum of its proper divisors (3904980).

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

2236428 is a wasteful number, since it uses less digits than its factorization.

2236428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 138 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 2236428 is about 1495.4691571544. The cubic root of 2236428 is about 130.7730663057.

The spelling of 2236428 in words is "two million, two hundred thirty-six thousand, four hundred twenty-eight".