782398628089 has 9 divisors (see below), whose sum is σ = 847225167309. Its totient is φ = 722203503840.

The previous prime is 782398628083. The next prime is 782398628093. The reversal of 782398628089 is 980826893287.

The square root of 782398628089 is 884533.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 41924610025 + 740474018064 = 204755^2 + 860508^2 .

It is not a de Polignac number, because 782398628089 - 2⁵ = 782398628057 is a prime.

It is a super-2 number, since 2×782398628089² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (782398628083) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11464909 + ... + 11532949.

It is an arithmetic number, because the mean of its divisors is an integer number (94136129701).

Almost surely, 2^782398628089 is an apocalyptic number.

782398628089 is the 884533-rd square number.

782398628089 is the 442267-th centered octagonal number.

It is an amenable number.

782398628089 is a deficient number, since it is larger than the sum of its proper divisors (64826539220).

782398628089 is an frugal number, since it uses more digits than its factorization.

782398628089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136108 (or 68054 counting only the distinct ones).

The product of its (nonzero) digits is 167215104, while the sum is 70.

The spelling of 782398628089 in words is "seven hundred eighty-two billion, three hundred ninety-eight million, six hundred twenty-eight thousand, eighty-nine".