385409225 has 12 divisors (see below), whose sum is σ = 489565020. Its totient is φ = 300806400.

The previous prime is 385409209. The next prime is 385409239. The reversal of 385409225 is 522904583.

It can be written as a sum of positive squares in 6 ways, for example, as 25775929 + 359633296 = 5077^2 + 18964^2 .

It is not a de Polignac number, because 385409225 - 2⁴ = 385409209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186980 + ... + 189029.

It is an arithmetic number, because the mean of its divisors is an integer number (40797085).

Almost surely, 2^385409225 is an apocalyptic number.

It is an amenable number.

385409225 is a deficient number, since it is larger than the sum of its proper divisors (104155795).

385409225 is a wasteful number, since it uses less digits than its factorization.

385409225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376060 (or 376055 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 385409225 is about 19631.8421193733. The cubic root of 385409225 is about 727.7362946440.

The spelling of 385409225 in words is "three hundred eighty-five million, four hundred nine thousand, two hundred twenty-five".