208831028 has 24 divisors (see below), whose sum is σ = 418146624. Its totient is φ = 89395200.

The previous prime is 208831019. The next prime is 208831039. The reversal of 208831028 is 820138802.

It is a super-2 number, since 2×208831028² = 87220796511073568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 208830985 and 208831003.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 23348 + ... + 31028.

It is an arithmetic number, because the mean of its divisors is an integer number (17422776).

Almost surely, 2^208831028 is an apocalyptic number.

208831028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

208831028 is an abundant number, since it is smaller than the sum of its proper divisors (209315596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

208831028 is a wasteful number, since it uses less digits than its factorization.

208831028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8663 (or 8661 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 208831028 is about 14450.9870943130. The cubic root of 208831028 is about 593.2872411557.

The spelling of 208831028 in words is "two hundred eight million, eight hundred thirty-one thousand, twenty-eight".