428352291 has 24 divisors (see below), whose sum is σ = 628031040. Its totient is φ = 281304576.

The previous prime is 428352277. The next prime is 428352311. The reversal of 428352291 is 192253824.

It is a happy number.

428352291 is a `hidden beast` number, since 42 + 8 + 3 + 522 + 91 = 666.

It is not a de Polignac number, because 428352291 - 2¹¹ = 428350243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428352251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207621 + ... + 209673.

It is an arithmetic number, because the mean of its divisors is an integer number (26167960).

Almost surely, 2^428352291 is an apocalyptic number.

428352291 is a deficient number, since it is larger than the sum of its proper divisors (199678749).

428352291 is a wasteful number, since it uses less digits than its factorization.

428352291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395 (or 2392 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 428352291 is about 20696.6734283556. The cubic root of 428352291 is about 753.8189161676.

The spelling of 428352291 in words is "four hundred twenty-eight million, three hundred fifty-two thousand, two hundred ninety-one".