7236394489 has 9 divisors (see below), whose sum is σ = 7286675151. Its totient is φ = 7186460160.

The previous prime is 7236394469. The next prime is 7236394513. The reversal of 7236394489 is 9844936327.

It is a happy number.

The square root of 7236394489 is 85067.

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., 7124204025 + 112190464 = 84405^2 + 10592^2 .

It is not a de Polignac number, because 7236394489 - 2⁹ = 7236393977 is a prime.

It is a super-2 number, since 2×7236394489² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7236394469) 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, 21862054 + ... + 21862384.

Almost surely, 2^7236394489 is an apocalyptic number.

7236394489 is the 85067-th square number.

7236394489 is the 42534-th centered octagonal number.

It is an amenable number.

7236394489 is a deficient number, since it is larger than the sum of its proper divisors (50280662).

7236394489 is an frugal number, since it uses more digits than its factorization.

7236394489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176 (or 588 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 55.

The cubic root of 7236394489 is about 1934.2268666733.

The spelling of 7236394489 in words is "seven billion, two hundred thirty-six million, three hundred ninety-four thousand, four hundred eighty-nine".