31240394 has 16 divisors (see below), whose sum is σ = 49032000. Its totient is φ = 14900160.

The previous prime is 31240393. The next prime is 31240397. The reversal of 31240394 is 49304213.

It is not an unprimeable number, because it can be changed into a prime (31240393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22274 + ... + 23634.

It is an arithmetic number, because the mean of its divisors is an integer number (3064500).

Almost surely, 2^31240394 is an apocalyptic number.

31240394 is a deficient number, since it is larger than the sum of its proper divisors (17791606).

31240394 is a wasteful number, since it uses less digits than its factorization.

31240394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 31240394 is about 5589.3106909529. The cubic root of 31240394 is about 314.9479850286.

The spelling of 31240394 in words is "thirty-one million, two hundred forty thousand, three hundred ninety-four".