31853420 has 12 divisors (see below), whose sum is σ = 66892224. Its totient is φ = 12741360.

The previous prime is 31853389. The next prime is 31853429. The reversal of 31853420 is 2435813.

It is a self number, because there is not a number n which added to its sum of digits gives 31853420.

It is not an unprimeable number, because it can be changed into a prime (31853429) 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 3 ways as a sum of consecutive naturals, for example, 796316 + ... + 796355.

It is an arithmetic number, because the mean of its divisors is an integer number (5574352).

Almost surely, 2^31853420 is an apocalyptic number.

It is an amenable number.

31853420 is an abundant number, since it is smaller than the sum of its proper divisors (35038804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31853420 is a wasteful number, since it uses less digits than its factorization.

31853420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592680 (or 1592678 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 31853420 is about 5643.8834148129. The cubic root of 31853420 is about 316.9947157515.

The spelling of 31853420 in words is "thirty-one million, eight hundred fifty-three thousand, four hundred twenty".