838681945 has 16 divisors (see below), whose sum is σ = 1061311680. Its totient is φ = 634478400.

The previous prime is 838681931. The next prime is 838681951. The reversal of 838681945 is 549186838.

It is not a de Polignac number, because 838681945 - 2⁹ = 838681433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 838681892 and 838681901.

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 15 ways as a sum of consecutive naturals, for example, 46515 + ... + 61975.

It is an arithmetic number, because the mean of its divisors is an integer number (66331980).

Almost surely, 2^838681945 is an apocalyptic number.

It is an amenable number.

838681945 is a deficient number, since it is larger than the sum of its proper divisors (222629735).

838681945 is a wasteful number, since it uses less digits than its factorization.

838681945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16056.

The product of its digits is 1658880, while the sum is 52.

The square root of 838681945 is about 28960.0059564911. The cubic root of 838681945 is about 943.0450313554.

The spelling of 838681945 in words is "eight hundred thirty-eight million, six hundred eighty-one thousand, nine hundred forty-five".