724138330 has 8 divisors (see below), whose sum is σ = 1303449012. Its totient is φ = 289655328.

The previous prime is 724138277. The next prime is 724138367. The reversal of 724138330 is 33831427.

It can be written as a sum of positive squares in 2 ways, for example, as 711769041 + 12369289 = 26679^2 + 3517^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 724138292 and 724138301.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36206907 + ... + 36206926.

Almost surely, 2^724138330 is an apocalyptic number.

724138330 is a deficient number, since it is larger than the sum of its proper divisors (579310682).

724138330 is a wasteful number, since it uses less digits than its factorization.

724138330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72413840.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 724138330 is about 26909.8184683583. The cubic root of 724138330 is about 897.9948487063.

Adding to 724138330 its reverse (33831427), we get a palindrome (757969757).

The spelling of 724138330 in words is "seven hundred twenty-four million, one hundred thirty-eight thousand, three hundred thirty".