1040731389 has 16 divisors (see below), whose sum is σ = 1542897600. Its totient is φ = 693337968.

The previous prime is 1040731369. The next prime is 1040731421. The reversal of 1040731389 is 9831370401.

It is a happy number.

It is not a de Polignac number, because 1040731389 - 2⁹ = 1040730877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040731339) 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, 28467 + ... + 53775.

It is an arithmetic number, because the mean of its divisors is an integer number (96431100).

Almost surely, 2^1040731389 is an apocalyptic number.

It is an amenable number.

1040731389 is a deficient number, since it is larger than the sum of its proper divisors (502166211).

1040731389 is a wasteful number, since it uses less digits than its factorization.

1040731389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26841 (or 26835 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1040731389 is about 32260.3687052706. The cubic root of 1040731389 is about 1013.3968525391.

The spelling of 1040731389 in words is "one billion, forty million, seven hundred thirty-one thousand, three hundred eighty-nine".