31440046 has 8 divisors (see below), whose sum is σ = 51447384. Its totient is φ = 14290920.

The previous prime is 31440001. The next prime is 31440049. The reversal of 31440046 is 64004413.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 1429093 = 31440046 / (3 + 1 + 4 + 4 + 0 + 0 + 4 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 31439999 and 31440026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714525 + ... + 714568.

It is an arithmetic number, because the mean of its divisors is an integer number (6430923).

Almost surely, 2^31440046 is an apocalyptic number.

31440046 is a deficient number, since it is larger than the sum of its proper divisors (20007338).

31440046 is a wasteful number, since it uses less digits than its factorization.

31440046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429106.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 31440046 is about 5607.1424094631. The cubic root of 31440046 is about 315.6174870087.

Adding to 31440046 its reverse (64004413), we get a palindrome (95444459).

The spelling of 31440046 in words is "thirty-one million, four hundred forty thousand, forty-six".