838720569 has 16 divisors (see below), whose sum is σ = 1127270144. Its totient is φ = 554677200.

The previous prime is 838720541. The next prime is 838720583. The reversal of 838720569 is 965027838.

It is not a de Polignac number, because 838720569 - 2²⁹ = 301849657 is a prime.

It is a super-2 number, since 2×838720569² = 1406904385727367522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (838722569) 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, 207522 + ... + 211524.

It is an arithmetic number, because the mean of its divisors is an integer number (70454384).

Almost surely, 2^838720569 is an apocalyptic number.

It is an amenable number.

838720569 is a deficient number, since it is larger than the sum of its proper divisors (288549575).

838720569 is a wasteful number, since it uses less digits than its factorization.

838720569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4548.

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 838720569 is about 28960.6727995052. The cubic root of 838720569 is about 943.0595078850.

The spelling of 838720569 in words is "eight hundred thirty-eight million, seven hundred twenty thousand, five hundred sixty-nine".