31425936 has 40 divisors (see below), whose sum is σ = 81393600. Its totient is φ = 10448256.

The previous prime is 31425929. The next prime is 31425941. The reversal of 31425936 is 63952413.

It is a junction number, because it is equal to n+sod(n) for n = 31425897 and 31425906.

It is an unprimeable number.

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, 28206 + ... + 29298.

It is an arithmetic number, because the mean of its divisors is an integer number (2034840).

Almost surely, 2^31425936 is an apocalyptic number.

It is an amenable number.

31425936 is an abundant number, since it is smaller than the sum of its proper divisors (49967664).

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

31425936 is a wasteful number, since it uses less digits than its factorization.

31425936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703 (or 1697 counting only the distinct ones).

The product of its digits is 19440, while the sum is 33.

The square root of 31425936 is about 5605.8840516015. The cubic root of 31425936 is about 315.5702645469.

The spelling of 31425936 in words is "thirty-one million, four hundred twenty-five thousand, nine hundred thirty-six".