1040730399 has 12 divisors (see below), whose sum is σ = 1510834000. Its totient is φ = 690332544.

The previous prime is 1040730371. The next prime is 1040730401. The reversal of 1040730399 is 9930370401.

It is not a de Polignac number, because 1040730399 - 2⁵ = 1040730367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040730319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 288754 + ... + 292335.

Almost surely, 2^1040730399 is an apocalyptic number.

1040730399 is a deficient number, since it is larger than the sum of its proper divisors (470103601).

1040730399 is a wasteful number, since it uses less digits than its factorization.

1040730399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581294 (or 581291 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 1040730399 is about 32260.3533613629. The cubic root of 1040730399 is about 1013.3965312063.

The spelling of 1040730399 in words is "one billion, forty million, seven hundred thirty thousand, three hundred ninety-nine".