1240072723 has 16 divisors (see below), whose sum is σ = 1304349696. Its totient is φ = 1177757280.

The previous prime is 1240072711. The next prime is 1240072751. The reversal of 1240072723 is 3272700421.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240072723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240072691 and 1240072700.

It is not an unprimeable number, because it can be changed into a prime (1240072703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268290 + ... + 272872.

It is an arithmetic number, because the mean of its divisors is an integer number (81521856).

Almost surely, 2^1240072723 is an apocalyptic number.

1240072723 is a deficient number, since it is larger than the sum of its proper divisors (64276973).

1240072723 is a wasteful number, since it uses less digits than its factorization.

1240072723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4794.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 1240072723 is about 35214.6663053904. Note that the first 3 decimals coincide. The cubic root of 1240072723 is about 1074.3580730017.

The spelling of 1240072723 in words is "one billion, two hundred forty million, seventy-two thousand, seven hundred twenty-three".