726439489 has 8 divisors (see below), whose sum is σ = 735743232. Its totient is φ = 717149040.

The previous prime is 726439481. The next prime is 726439501. The reversal of 726439489 is 984934627.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 726439489 - 2³ = 726439481 is a prime.

It is a super-2 number, since 2×726439489² = 1055428662357162242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726439481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152112 + ... + 156814.

It is an arithmetic number, because the mean of its divisors is an integer number (91967904).

Almost surely, 2^726439489 is an apocalyptic number.

It is an amenable number.

726439489 is a deficient number, since it is larger than the sum of its proper divisors (9303743).

726439489 is a wasteful number, since it uses less digits than its factorization.

726439489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6647.

The product of its digits is 2612736, while the sum is 52.

The square root of 726439489 is about 26952.5414200591. The cubic root of 726439489 is about 898.9450556888.

The spelling of 726439489 in words is "seven hundred twenty-six million, four hundred thirty-nine thousand, four hundred eighty-nine".