31046389 has 24 divisors (see below), whose sum is σ = 36720576. Its totient is φ = 25977600.

The previous prime is 31046381. The next prime is 31046417. The reversal of 31046389 is 98364013.

It is not a de Polignac number, because 31046389 - 2³ = 31046381 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 (31046381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 425257 + ... + 425329.

It is an arithmetic number, because the mean of its divisors is an integer number (1530024).

Almost surely, 2^31046389 is an apocalyptic number.

It is an amenable number.

31046389 is a deficient number, since it is larger than the sum of its proper divisors (5674187).

31046389 is a wasteful number, since it uses less digits than its factorization.

31046389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 31046389 is about 5571.9286607063. The cubic root of 31046389 is about 314.2946812377.

The spelling of 31046389 in words is "thirty-one million, forty-six thousand, three hundred eighty-nine".