31040046 has 12 divisors (see below), whose sum is σ = 67253472. Its totient is φ = 10346676.

The previous prime is 31040029. The next prime is 31040047. The reversal of 31040046 is 64004013.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1724447 = 31040046 / (3 + 1 + 0 + 4 + 0 + 0 + 4 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31040047) 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 5 ways as a sum of consecutive naturals, for example, 862206 + ... + 862241.

It is an arithmetic number, because the mean of its divisors is an integer number (5604456).

Almost surely, 2^31040046 is an apocalyptic number.

31040046 is an abundant number, since it is smaller than the sum of its proper divisors (36213426).

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

31040046 is a wasteful number, since it uses less digits than its factorization.

31040046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724455 (or 1724452 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 31040046 is about 5571.3594391315. The cubic root of 31040046 is about 314.2732755604.

Adding to 31040046 its reverse (64004013), we get a palindrome (95044059).

The spelling of 31040046 in words is "thirty-one million, forty thousand, forty-six".