838642645 has 16 divisors (see below), whose sum is σ = 1014285888. Its totient is φ = 665660160.

The previous prime is 838642643. The next prime is 838642663. The reversal of 838642645 is 546246838.

It is not a de Polignac number, because 838642645 - 2¹ = 838642643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 838642595 and 838642604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838642643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368802 + ... + 371068.

It is an arithmetic number, because the mean of its divisors is an integer number (63392868).

Almost surely, 2^838642645 is an apocalyptic number.

It is an amenable number.

838642645 is a deficient number, since it is larger than the sum of its proper divisors (175643243).

838642645 is a wasteful number, since it uses less digits than its factorization.

838642645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820.

The product of its digits is 1105920, while the sum is 46.

The square root of 838642645 is about 28959.3274265823. The cubic root of 838642645 is about 943.0303010003.

The spelling of 838642645 in words is "eight hundred thirty-eight million, six hundred forty-two thousand, six hundred forty-five".