428233381 has 8 divisors (see below), whose sum is σ = 457501280. Its totient is φ = 399638448.

The previous prime is 428233363. The next prime is 428233391. The reversal of 428233381 is 183332824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428233381 - 2¹¹ = 428231333 is a prime.

It is a super-2 number, since 2×428233381² = 366767657205382322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428233321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166926 + ... + 169471.

It is an arithmetic number, because the mean of its divisors is an integer number (57187660).

Almost surely, 2^428233381 is an apocalyptic number.

It is an amenable number.

428233381 is a deficient number, since it is larger than the sum of its proper divisors (29267899).

428233381 is a wasteful number, since it uses less digits than its factorization.

428233381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336483.

The product of its digits is 27648, while the sum is 34.

The square root of 428233381 is about 20693.8005450908. The cubic root of 428233381 is about 753.7491566848.

The spelling of 428233381 in words is "four hundred twenty-eight million, two hundred thirty-three thousand, three hundred eighty-one".