428308831 has 8 divisors (see below), whose sum is σ = 430082864. Its totient is φ = 426539520.

The previous prime is 428308817. The next prime is 428308843. The reversal of 428308831 is 138803824.

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 428308831 - 2⁷ = 428308703 is a prime.

It is a super-2 number, since 2×428308831² = 366896909425173122, 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 (428308861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380836 + ... + 381958.

It is an arithmetic number, because the mean of its divisors is an integer number (53760358).

Almost surely, 2^428308831 is an apocalyptic number.

428308831 is a deficient number, since it is larger than the sum of its proper divisors (1774033).

428308831 is a wasteful number, since it uses less digits than its factorization.

428308831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 428308831 is about 20695.6234745417. The cubic root of 428308831 is about 753.7934215154.

The spelling of 428308831 in words is "four hundred twenty-eight million, three hundred eight thousand, eight hundred thirty-one".