428326831 has 2 divisors, whose sum is σ = 428326832. Its totient is φ = 428326830.

The previous prime is 428326819. The next prime is 428326841. The reversal of 428326831 is 138623824.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428326831 is a prime.

It is a super-2 number, since 2×428326831² = 366927748309005122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428326841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214163415 + 214163416.

It is an arithmetic number, because the mean of its divisors is an integer number (214163416).

Almost surely, 2^428326831 is an apocalyptic number.

428326831 is a deficient number, since it is larger than the sum of its proper divisors (1).

428326831 is an equidigital number, since it uses as much as digits as its factorization.

428326831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 37.

The square root of 428326831 is about 20696.0583445254. The cubic root of 428326831 is about 753.8039809455.

The spelling of 428326831 in words is "four hundred twenty-eight million, three hundred twenty-six thousand, eight hundred thirty-one".