905009390 has 16 divisors (see below), whose sum is σ = 1666901808. Its totient is φ = 353584896.

The previous prime is 905009327. The next prime is 905009407. The reversal of 905009390 is 93900509.

It is a self number, because there is not a number n which added to its sum of digits gives 905009390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1051907 + ... + 1052766.

It is an arithmetic number, because the mean of its divisors is an integer number (104181363).

Almost surely, 2^905009390 is an apocalyptic number.

905009390 is a deficient number, since it is larger than the sum of its proper divisors (761892418).

905009390 is a wasteful number, since it uses less digits than its factorization.

905009390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104723.

The product of its (nonzero) digits is 10935, while the sum is 35.

The square root of 905009390 is about 30083.3739796586. The cubic root of 905009390 is about 967.2773724529.

Adding to 905009390 its reverse (93900509), we get a palindrome (998909899).

The spelling of 905009390 in words is "nine hundred five million, nine thousand, three hundred ninety".