838269666 has 48 divisors (see below), whose sum is σ = 1963328640. Its totient is φ = 256957920.

The previous prime is 838269637. The next prime is 838269701. The reversal of 838269666 is 666962838.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 56805 + ... + 70023.

It is an arithmetic number, because the mean of its divisors is an integer number (40902680).

Almost surely, 2^838269666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 838269666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (981664320).

838269666 is an abundant number, since it is smaller than the sum of its proper divisors (1125058974).

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

838269666 is a wasteful number, since it uses less digits than its factorization.

838269666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13511 (or 13508 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 838269666 is about 28952.8870063073. The cubic root of 838269666 is about 942.8904787702.

The spelling of 838269666 in words is "eight hundred thirty-eight million, two hundred sixty-nine thousand, six hundred sixty-six".