31114240 has 88 divisors (see below), whose sum is σ = 76639680. Its totient is φ = 12115968.

The previous prime is 31114189. The next prime is 31114249. The reversal of 31114240 is 4241113.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (31114249) 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, 302029 + ... + 302131.

Almost surely, 2^31114240 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 31114240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38319840).

31114240 is an abundant number, since it is smaller than the sum of its proper divisors (45525440).

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

31114240 is a wasteful number, since it uses less digits than its factorization.

31114240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 31114240 is about 5578.0139834891. The cubic root of 31114240 is about 314.5234753393.

Adding to 31114240 its reverse (4241113), we get a palindrome (35355353).

The spelling of 31114240 in words is "thirty-one million, one hundred fourteen thousand, two hundred forty".