726689442 has 16 divisors (see below), whose sum is σ = 1458055872. Its totient is φ = 241450320.

The previous prime is 726689423. The next prime is 726689477. The reversal of 726689442 is 244986627.

It is a super-2 number, since 2×726689442² = 1056155090228542728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 726689391 and 726689400.

It is an unprimeable number.

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, 192853 + ... + 196584.

It is an arithmetic number, because the mean of its divisors is an integer number (91128492).

Almost surely, 2^726689442 is an apocalyptic number.

726689442 is an abundant number, since it is smaller than the sum of its proper divisors (731366430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

726689442 is a wasteful number, since it uses less digits than its factorization.

726689442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389753.

The product of its digits is 1161216, while the sum is 48.

The square root of 726689442 is about 26957.1779309333. The cubic root of 726689442 is about 899.0481467473.

The spelling of 726689442 in words is "seven hundred twenty-six million, six hundred eighty-nine thousand, four hundred forty-two".