31868040 has 32 divisors (see below), whose sum is σ = 95604480. Its totient is φ = 8498112.

The previous prime is 31868027. The next prime is 31868051. The reversal of 31868040 is 4086813.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 31867989 and 31868007.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132664 + ... + 132903.

It is an arithmetic number, because the mean of its divisors is an integer number (2987640).

Almost surely, 2^31868040 is an apocalyptic number.

31868040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31868040 is an abundant number, since it is smaller than the sum of its proper divisors (63736440).

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

31868040 is a wasteful number, since it uses less digits than its factorization.

31868040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265581 (or 265577 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 31868040 is about 5645.1784737066. The cubic root of 31868040 is about 317.0432061374.

The spelling of 31868040 in words is "thirty-one million, eight hundred sixty-eight thousand, forty".