1072724138 has 8 divisors (see below), whose sum is σ = 1609284132. Its totient is φ = 536296096.

The previous prime is 1072724129. The next prime is 1072724141. The reversal of 1072724138 is 8314272701.

It can be written as a sum of positive squares in 2 ways, for example, as 734789449 + 337934689 = 27107^2 + 18383^2 .

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 = 1072724098 and 1072724107.

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, 9245 + ... + 47232.

Almost surely, 2^1072724138 is an apocalyptic number.

1072724138 is a deficient number, since it is larger than the sum of its proper divisors (536559994).

1072724138 is an equidigital number, since it uses as much as digits as its factorization.

1072724138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65976.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 1072724138 is about 32752.4676627579. The cubic root of 1072724138 is about 1023.6763840713.

Adding to 1072724138 its reverse (8314272701), we get a palindrome (9386996839).

The spelling of 1072724138 in words is "one billion, seventy-two million, seven hundred twenty-four thousand, one hundred thirty-eight".