31425680 has 160 divisors (see below), whose sum is σ = 89244288. Its totient is φ = 10137600.

The previous prime is 31425643. The next prime is 31425683. The reversal of 31425680 is 8652413.

It is not an unprimeable number, because it can be changed into a prime (31425683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 469007 + ... + 469073.

Almost surely, 2^31425680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31425680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44622144).

31425680 is an abundant number, since it is smaller than the sum of its proper divisors (57818608).

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

31425680 is a wasteful number, since it uses less digits than its factorization.

31425680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 31425680 is about 5605.8612184035. The cubic root of 31425680 is about 315.5694076516.

The spelling of 31425680 in words is "thirty-one million, four hundred twenty-five thousand, six hundred eighty".