31426478 has 12 divisors (see below), whose sum is σ = 47545800. Its totient is φ = 15578640.

The previous prime is 31426477. The next prime is 31426511. The reversal of 31426478 is 87462413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31426471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111698 + ... + 111978.

It is an arithmetic number, because the mean of its divisors is an integer number (3962150).

Almost surely, 2^31426478 is an apocalyptic number.

31426478 is a deficient number, since it is larger than the sum of its proper divisors (16119322).

31426478 is an equidigital number, since it uses as much as digits as its factorization.

31426478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763 (or 482 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 31426478 is about 5605.9323934561. The cubic root of 31426478 is about 315.5720787394.

The spelling of 31426478 in words is "thirty-one million, four hundred twenty-six thousand, four hundred seventy-eight".