31425648 has 20 divisors (see below), whose sum is σ = 81183048. Its totient is φ = 10475200.

The previous prime is 31425643. The next prime is 31425683. The reversal of 31425648 is 84652413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31425643) 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, 327303 + ... + 327398.

Almost surely, 2^31425648 is an apocalyptic number.

It is an amenable number.

31425648 is an abundant number, since it is smaller than the sum of its proper divisors (49757400).

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

31425648 is a wasteful number, since it uses less digits than its factorization.

31425648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654712 (or 654706 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 31425648 is about 5605.8583642472. The cubic root of 31425648 is about 315.5693005394.

The spelling of 31425648 in words is "thirty-one million, four hundred twenty-five thousand, six hundred forty-eight".