395809880 has 16 divisors (see below), whose sum is σ = 890572320. Its totient is φ = 158323936.

The previous prime is 395809871. The next prime is 395809943. The reversal of 395809880 is 88908593.

It is a super-2 number, since 2×395809880² = 313330922211228800, 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, 4947584 + ... + 4947663.

It is an arithmetic number, because the mean of its divisors is an integer number (55660770).

Almost surely, 2^395809880 is an apocalyptic number.

It is an amenable number.

395809880 is an abundant number, since it is smaller than the sum of its proper divisors (494762440).

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

395809880 is a wasteful number, since it uses less digits than its factorization.

395809880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9895258 (or 9895254 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 395809880 is about 19894.9712239048. The cubic root of 395809880 is about 734.2245079402.

The spelling of 395809880 in words is "three hundred ninety-five million, eight hundred nine thousand, eight hundred eighty".