724312426 has 4 divisors (see below), whose sum is σ = 1086468642. Its totient is φ = 362156212.

The previous prime is 724312417. The next prime is 724312447. The reversal of 724312426 is 624213427.

It is a happy number.

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., 696907201 + 27405225 = 26399^2 + 5235^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 as a sum of consecutive naturals, namely, 181078105 + ... + 181078108.

Almost surely, 2^724312426 is an apocalyptic number.

724312426 is a deficient number, since it is larger than the sum of its proper divisors (362156216).

724312426 is a wasteful number, since it uses less digits than its factorization.

724312426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362156215.

The product of its digits is 16128, while the sum is 31.

The square root of 724312426 is about 26913.0530783856. The cubic root of 724312426 is about 898.0668076943.

The spelling of 724312426 in words is "seven hundred twenty-four million, three hundred twelve thousand, four hundred twenty-six".