31428314 has 4 divisors (see below), whose sum is σ = 47142474. Its totient is φ = 15714156.

The previous prime is 31428307. The next prime is 31428329. The reversal of 31428314 is 41382413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41382413 = 103 ⋅401771.

It can be written as a sum of positive squares in only one way, i.e., 28249225 + 3179089 = 5315^2 + 1783^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7857077 + ... + 7857080.

Almost surely, 2^31428314 is an apocalyptic number.

31428314 is a deficient number, since it is larger than the sum of its proper divisors (15714160).

31428314 is a wasteful number, since it uses less digits than its factorization.

31428314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15714159.

The product of its digits is 2304, while the sum is 26.

The square root of 31428314 is about 5606.0961461609. The cubic root of 31428314 is about 315.5782240781.

The spelling of 31428314 in words is "thirty-one million, four hundred twenty-eight thousand, three hundred fourteen".