31240068 has 24 divisors (see below), whose sum is σ = 73715040. Its totient is φ = 10296000.

The previous prime is 31240061. The next prime is 31240109. The reversal of 31240068 is 86004213.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31240061) 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, 13558 + ... + 15693.

It is an arithmetic number, because the mean of its divisors is an integer number (3071460).

Almost surely, 2^31240068 is an apocalyptic number.

It is an amenable number.

31240068 is an abundant number, since it is smaller than the sum of its proper divisors (42474972).

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

31240068 is a wasteful number, since it uses less digits than its factorization.

31240068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29347 (or 29345 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 31240068 is about 5589.2815280678. The cubic root of 31240068 is about 314.9468895089.

The spelling of 31240068 in words is "thirty-one million, two hundred forty thousand, sixty-eight".