31018040 has 16 divisors (see below), whose sum is σ = 69790680. Its totient is φ = 12407200.

The previous prime is 31018037. The next prime is 31018061. The reversal of 31018040 is 4081013.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387686 + ... + 387765.

Almost surely, 2^31018040 is an apocalyptic number.

It is an amenable number.

31018040 is an abundant number, since it is smaller than the sum of its proper divisors (38772640).

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

31018040 is a wasteful number, since it uses less digits than its factorization.

31018040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775462 (or 775458 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 31018040 is about 5569.3841670332. The cubic root of 31018040 is about 314.1989894517.

Adding to 31018040 its reverse (4081013), we get a palindrome (35099053).

The spelling of 31018040 in words is "thirty-one million, eighteen thousand, forty".