208428992 has 28 divisors (see below), whose sum is σ = 424784520. Its totient is φ = 101396736.

The previous prime is 208428947. The next prime is 208429007. The reversal of 208428992 is 299824802.

208428992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×208428992² = 86885289412272128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41642 + ... + 46377.

Almost surely, 2^208428992 is an apocalyptic number.

It is an amenable number.

208428992 is an abundant number, since it is smaller than the sum of its proper divisors (216355528).

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

208428992 is an equidigital number, since it uses as much as digits as its factorization.

208428992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88068 (or 88058 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 208428992 is about 14437.0700628625. The cubic root of 208428992 is about 592.9062695772.

The spelling of 208428992 in words is "two hundred eight million, four hundred twenty-eight thousand, nine hundred ninety-two".