1040040393 has 16 divisors (see below), whose sum is σ = 1618544640. Its totient is φ = 581663376.

The previous prime is 1040040389. The next prime is 1040040401. The reversal of 1040040393 is 3930400401.

It is not a de Polignac number, because 1040040393 - 2² = 1040040389 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1040040343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525883 + ... + 527856.

It is an arithmetic number, because the mean of its divisors is an integer number (101159040).

Almost surely, 2^1040040393 is an apocalyptic number.

It is an amenable number.

1040040393 is a deficient number, since it is larger than the sum of its proper divisors (578504247).

1040040393 is a wasteful number, since it uses less digits than its factorization.

1040040393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053796.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1040040393 is about 32249.6572539926. The cubic root of 1040040393 is about 1013.1725204926.

Adding to 1040040393 its reverse (3930400401), we get a palindrome (4970440794).

The spelling of 1040040393 in words is "one billion, forty million, forty thousand, three hundred ninety-three".