428810291 has 24 divisors (see below), whose sum is σ = 534910464. Its totient is φ = 336566880.

The previous prime is 428810243. The next prime is 428810303. The reversal of 428810291 is 192018824.

It is a de Polignac number, because none of the positive numbers 2^k-428810291 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428815291) 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 23 ways as a sum of consecutive naturals, for example, 153590 + ... + 156356.

It is an arithmetic number, because the mean of its divisors is an integer number (22287936).

Almost surely, 2^428810291 is an apocalyptic number.

428810291 is a deficient number, since it is larger than the sum of its proper divisors (106100173).

428810291 is a wasteful number, since it uses less digits than its factorization.

428810291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931 (or 2918 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 428810291 is about 20707.7350523904. The cubic root of 428810291 is about 754.0874848945.

The spelling of 428810291 in words is "four hundred twenty-eight million, eight hundred ten thousand, two hundred ninety-one".