31109480 has 16 divisors (see below), whose sum is σ = 69996420. Its totient is φ = 12443776.

The previous prime is 31109467. The next prime is 31109483. The reversal of 31109480 is 8490113.

It can be written as a sum of positive squares in 2 ways, for example, as 30184036 + 925444 = 5494^2 + 962^2 .

It is not an unprimeable number, because it can be changed into a prime (31109483) 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, 388829 + ... + 388908.

Almost surely, 2^31109480 is an apocalyptic number.

It is an amenable number.

31109480 is an abundant number, since it is smaller than the sum of its proper divisors (38886940).

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

31109480 is a wasteful number, since it uses less digits than its factorization.

31109480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777748 (or 777744 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 31109480 is about 5577.5872920108. The cubic root of 31109480 is about 314.5074354371.

Adding to 31109480 its reverse (8490113), we get a palindrome (39599593).

The spelling of 31109480 in words is "thirty-one million, one hundred nine thousand, four hundred eighty".