724091506 has 8 divisors (see below), whose sum is σ = 1150027740. Its totient is φ = 340748928.

The previous prime is 724091503. The next prime is 724091507. The reversal of 724091506 is 605190427.

It can be written as a sum of positive squares in 2 ways, for example, as 714225625 + 9865881 = 26725^2 + 3141^2 .

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

It is a super-2 number, since 2×724091506² = 1048617018122696072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 21296809 = 724091506 / (7 + 2 + 4 + 0 + 9 + 1 + 5 + 0 + 6).

It is not an unprimeable number, because it can be changed into a prime (724091503) 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 3 ways as a sum of consecutive naturals, for example, 10648371 + ... + 10648438.

Almost surely, 2^724091506 is an apocalyptic number.

724091506 is a deficient number, since it is larger than the sum of its proper divisors (425936234).

724091506 is a wasteful number, since it uses less digits than its factorization.

724091506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21296828.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 724091506 is about 26908.9484372764. The cubic root of 724091506 is about 897.9754930043.

The spelling of 724091506 in words is "seven hundred twenty-four million, ninety-one thousand, five hundred six".