724372906 has 4 divisors (see below), whose sum is σ = 1086559362. Its totient is φ = 362186452.

The previous prime is 724372903. The next prime is 724372981. The reversal of 724372906 is 609273427.

724372906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 546390625 + 177982281 = 23375^2 + 13341^2 .

It is a super-2 number, since 2×724372906² = 1049432213893769672, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (724372903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181093225 + ... + 181093228.

Almost surely, 2^724372906 is an apocalyptic number.

724372906 is a deficient number, since it is larger than the sum of its proper divisors (362186456).

724372906 is a wasteful number, since it uses less digits than its factorization.

724372906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362186455.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 724372906 is about 26914.1766732702. The cubic root of 724372906 is about 898.0918031552.

The spelling of 724372906 in words is "seven hundred twenty-four million, three hundred seventy-two thousand, nine hundred six".