31428338 has 8 divisors (see below), whose sum is σ = 47166300. Its totient is φ = 15706240.

The previous prime is 31428329. The next prime is 31428343. The reversal of 31428338 is 83382413.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31281649 + 146689 = 5593^2 + 383^2 .

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

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 in 3 ways as a sum of consecutive naturals, for example, 5738 + ... + 9786.

Almost surely, 2^31428338 is an apocalyptic number.

31428338 is a deficient number, since it is larger than the sum of its proper divisors (15737962).

31428338 is a wasteful number, since it uses less digits than its factorization.

31428338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7932.

The product of its digits is 13824, while the sum is 32.

The square root of 31428338 is about 5606.0982866875. The cubic root of 31428338 is about 315.5783044078.

The spelling of 31428338 in words is "thirty-one million, four hundred twenty-eight thousand, three hundred thirty-eight".