31380680 has 32 divisors (see below), whose sum is σ = 72887040. Its totient is φ = 12146880.

The previous prime is 31380677. The next prime is 31380683. The reversal of 31380680 is 8608313.

It is an interprime number because it is at equal distance from previous prime (31380677) and next prime (31380683).

It is not an unprimeable number, because it can be changed into a prime (31380683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11414 + ... + 13893.

It is an arithmetic number, because the mean of its divisors is an integer number (2277720).

Almost surely, 2^31380680 is an apocalyptic number.

It is an amenable number.

31380680 is an abundant number, since it is smaller than the sum of its proper divisors (41506360).

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

31380680 is a wasteful number, since it uses less digits than its factorization.

31380680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25349 (or 25345 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 31380680 is about 5601.8461242701. The cubic root of 31380680 is about 315.4187091683.

Adding to 31380680 its reverse (8608313), we get a palindrome (39988993).

The spelling of 31380680 in words is "thirty-one million, three hundred eighty thousand, six hundred eighty".