838495890 has 24 divisors (see below), whose sum is σ = 2180089548. Its totient is φ = 223598880.

The previous prime is 838495877. The next prime is 838495901. The reversal of 838495890 is 98594838.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 825815169 + 12680721 = 28737^2 + 3561^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4658221 + ... + 4658400.

Almost surely, 2^838495890 is an apocalyptic number.

838495890 is an abundant number, since it is smaller than the sum of its proper divisors (1341593658).

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

838495890 is a wasteful number, since it uses less digits than its factorization.

838495890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9316634 (or 9316631 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The square root of 838495890 is about 28956.7935034251. The cubic root of 838495890 is about 942.9752904877.

The spelling of 838495890 in words is "eight hundred thirty-eight million, four hundred ninety-five thousand, eight hundred ninety".