244390689 has 27 divisors (see below), whose sum is σ = 368476563. Its totient is φ = 162082944.

The previous prime is 244390649. The next prime is 244390693. The reversal of 244390689 is 986093442.

The square root of 244390689 is 15633.

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

It can be written as a sum of positive squares in only one way, i.e., 59213025 + 185177664 = 7695^2 + 13608^2 .

It is a tau number, because it is divible by the number of its divisors (27).

It is not a de Polignac number, because 244390689 - 2²⁵ = 210836257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (244390649) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1266177 + ... + 1266369.

Almost surely, 2^244390689 is an apocalyptic number.

244390689 is the 15633-rd square number.

244390689 is the 7817-th centered octagonal number.

It is an amenable number.

244390689 is a deficient number, since it is larger than the sum of its proper divisors (124085874).

244390689 is an frugal number, since it uses more digits than its factorization.

244390689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The cubic root of 244390689 is about 625.2133151330.

The spelling of 244390689 in words is "two hundred forty-four million, three hundred ninety thousand, six hundred eighty-nine".