31394398 has 24 divisors (see below), whose sum is σ = 55301400. Its totient is φ = 13326768.

The previous prime is 31394387. The next prime is 31394399. The reversal of 31394398 is 89349313.

It is a self number, because there is not a number n which added to its sum of digits gives 31394398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31394399) 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, 9213 + ... + 12151.

It is an arithmetic number, because the mean of its divisors is an integer number (2304225).

Almost surely, 2^31394398 is an apocalyptic number.

31394398 is a deficient number, since it is larger than the sum of its proper divisors (23907002).

31394398 is a wasteful number, since it uses less digits than its factorization.

31394398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064 (or 3057 counting only the distinct ones).

The product of its digits is 69984, while the sum is 40.

The square root of 31394398 is about 5603.0704082672. The cubic root of 31394398 is about 315.4646640202.

The spelling of 31394398 in words is "thirty-one million, three hundred ninety-four thousand, three hundred ninety-eight".