31426394 has 16 divisors (see below), whose sum is σ = 48722688. Its totient is φ = 15190992.

The previous prime is 31426393. The next prime is 31426397. The reversal of 31426394 is 49362413.

It is a self number, because there is not a number n which added to its sum of digits gives 31426394.

It is not an unprimeable number, because it can be changed into a prime (31426391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11087 + ... + 13629.

It is an arithmetic number, because the mean of its divisors is an integer number (3045168).

Almost surely, 2^31426394 is an apocalyptic number.

31426394 is a deficient number, since it is larger than the sum of its proper divisors (17296294).

31426394 is a wasteful number, since it uses less digits than its factorization.

31426394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749.

The product of its digits is 15552, while the sum is 32.

The square root of 31426394 is about 5605.9249013878. The cubic root of 31426394 is about 315.5717975744.

The spelling of 31426394 in words is "thirty-one million, four hundred twenty-six thousand, three hundred ninety-four".